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CAXIUANA NATIONAL FOREST, Brazil — A short walk beneath the dense Amazon canopy, the forest abruptly opens up. Fallen logs are rotting, the trees grow sparser and the temperature rises in places sunlight hits the ground. This is what 24 years of severe drought looks like in the world’s largest rainforest.

But this patch of degraded forest, about the size of a soccer field, is a scientific experiment. Launched in 2000 by Brazilian and British scientists, Endecaflor — short for “Forest Drought Study Project” in Portuguese— set out to simulate a future in which the changing climate could deplete the Amazon of rainfall. It is the longest-running project of its kind in the world, and has become a source for dozens of academic articles in fields ranging from meteorology to ecology and physiology.

Understanding how drought can affect the Amazon, an area twice the size of India that crosses into several South American nations, has implications far beyond the region. The rainforest stores a massive amount of carbon dioxide, a greenhouse gas that is the main driver of climate change. According to one studythe Amazon stores the equivalent of two years of global carbon emissions, which mainly come from the burning of coal, oil and gasoline. When trees are cut, or wither and die from drought, they release into the atmosphere the carbon they were storing, which accelerates global warming.

To mimic stress from drought, the project, located in the Caxiuana National Forestassembled about 6,000 transparent plastic rectangular panels across one hectare (2.5 acres), diverting around 50% of the rainfall from the forest floor. They were set 1 meter above ground (3.3 ft) on the sides to 4 meters (13.1 ft) above ground in the center. The water was funneled into gutters and channeled through trenches dug around the plot’s perimeter.

Next to it, an identical plot was left untouched to serve as a control. In both areas, instruments were attached to trees, placed on the ground and buried to measure soil moisture, air temperature, tree growth, sap flow and root development, among other data. Two metal towers sit above each plot.

In each tower, NASA radars measure how much water is in the plants, which helps researchers understand overall forest stress. The data is sent to the space agency’s Jet Propulsion Laboratory in California, where it is processed.

“The forest initially appeared to be resistant to the drought,” said Lucy Rowland, an ecology professor at the University of Exeter.

That began to change about 8 years in, however. “We saw a really big decline in biomass, big losses and mortality of the largest trees,” said Rowland.

This resulted in the loss of approximately 40% of the total weight of the vegetation and the carbon stored within it from the plot. The main findings were detailed in a study published in May in the journal Nature Ecology & Evolution. It shows that during the years of vegetation loss, the rainforest shifted from a carbon sink, that is, a storer of carbon dioxide, to a carbon emitter, before eventually stabilizing.

There was one piece of good news: the decades-long drought didn’t turn the rainforest into a savanna, or large grassy plain, as earlier model-based studies had predicted.

In November, most of the 6,000 transparent plastic covers were removed, and now scientists are observing how the forest changes. There is currently no end date for the project.

“The forest has already adapted. Now we want to understand what happens next,” said meteorologist João de Athaydes, vice coordinator of Esecaflor, a professor at the Federal University of Para and coauthor of the Nature study. “The idea is to see whether the forest can regenerate and return to the baseline from when we started the project.”

During a visit in April, Athaydes guided Associated Press journalists through the site, which had many researchers. The area was so remote that most researchers had endured a full-day boat trip from the city of Belem, which will host the next annual U.N. climate talks later this year. During the days in the field, the scientists stayed at the Ferreira Penna Scientific Base of the Emilio Goeldi Museum, a few hundred yards (meters) from the plots.

Four teams were at work. One collected soil samples to measure root growth in the top layer. Another gathered weather data and tracking soil temperature and moisture. A third was measured vegetation moisture and sap flow. The fourt focused on plant physiology.

“We know very little about how drought influences soil processes,” said ecologist Rachel Selman, researcher at the University of Edinburgh and one of the co-authors of the Nature study, during a break.

Esecaflor’s drought simulation draws some parallels with the past two years, when much of the Amazon rainforest, under the influence of El Nino and the impact of climate change, endured its most severe dry spells on record. The devastating consequences ranged from the death of dozens of river dolphins due to warming and receding waters to vast wildfires in old-growth areas.

Rowland explained that the recent El Nino brought short-term, intense impacts to the Amazon, not just through reduced rainfall but also with spikes in temperature and vapor pressure deficit, a measure of how dry the air is. In contrast, the Esecaflor experiment focused only on manipulating soil moisture to study the effects of long-term shifts in rainfall.

“But in both cases, we’re seeing a loss of the forest’s ability to absorb carbon,” she said. “Instead, carbon is being released back into the atmosphere, along with the loss of forest cover.”

___

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Google will return to federal court Friday to fend off the U.S. Justice Department’s attempt to topple its internet empire at the same time it’s navigating a pivotal shift to artificial intelligence that could undercut its power.

The legal and technological threats facing Google are among the key issues that will be dissected during the closing arguments of a legal proceeding that will determine the changes imposed upon the company in the wake of its dominant search engine being declared as an illegal monopoly by U.S. District Judge Amit Mehta last year.

Brandishing evidence presented during a recent three-week stretch of hearingsJustice Department lawyers will attempt to persuade Mehta to order a radical shake-up that includes a ban on Google paying to lock its search engine in as the default on smart devices and an order requiring the company to sell its Chrome browser.

Google lawyers are expected to assert only minor concessions are needed, especially as the upheaval triggered by advances in artificial intelligence already are reshaping the search landscape, as alternative, conversational search options are rolling out from AI startups that are hoping to use the Department of Justice’s four-and-half-year-old case to gain the upper hand in the next technological frontier.

“Over weeks of testimony, we heard from a series of well-funded companies eager to gain access to Google’s technology so they don’t have to innovate themselves,” Lee-Anne Mulholland, Google’s vice president of regulatory affairs, wrote in a blog post earlier this month. “What we didn’t hear was how DOJ’s extreme proposals would benefit consumers.”

After the day-long closing arguments, Mehta will spend much of the summer mulling a decision that he plans to issue before Labor Day. Google has already vowed to appeal the ruling that branded its search engine as a monopoly, a step it can’t take until the judge orders a remedy.

While both sides of this showdown agree that AI is an inflection point for the industry’s future, they have disparate views on how the shift will affect Google.

The Justice Department contends that AI technology by itself won’t rein in Google’s power, arguing additional legal restraints must be slapped on a search engine that’s the main reason its parent company, Alphabet Inc., is valued at $2 trillion.

Google has already been deploying AI to transform its search engine i nto an answer engine, an effort that has so far helped maintain its perch as the internet’s main gateway despite inroads being made by alternatives from the likes of OpenAI and Perplexity.

The Justice Department contends a divestiture of the Chrome browser that Google CEO Sundar Pichai helped build nearly 20 years ago would be among the most effective countermeasures against Google continuing to amass massive volumes of browser traffic and personal data that could be leveraged to retain its dominance in the AI era. Executives from both OpenAi and Perplexity testified last month that they would be eager bidders for the Chrome browser if Mehta orders its sale.

The debate over Google’s fate also has pulled in opinions from Apple, mobile app developers, legal scholars and startups.

Apple, which collects more than $20 billion annually to make Google the default search engine on the iPhone and its other devices, filed briefs arguing against the Justice Department’s proposed 10-year ban on such lucrative lock-in agreements. Apple told the judge that prohibiting the contracts would deprive the company of money that it funnels into its own research, and that the ban might even make Google even more powerful because the company would be able to hold onto its money while consumers would end up choosing its search engine anyway. The Cupertino, California, company also told the judge a ban wouldn’t compel it to build its own search engine to compete against Google.

In other filings, a group of legal scholars said the Justice Department’s proposed divestiture of Chrome would be an improper penalty that would inject unwarranted government interference in a company’s business. Meanwhile, former Federal Trade Commission officials James Cooper and Andrew Stivers warned that another proposal that would require Google to share its data with rival search engines “does not account for the expectations users have developed over time regarding the privacy, security, and stewardship” of their personal information.

The App Association, a group that represents mostly small software developers, also advised Mehta not to adopt the Justice Department’s proposed changes because of the ripple effects they would have across the tech industry.

Hobbling Google in the way the Justice Department envisions would make it more difficult for startups to realize their goal of being acquired, the App Association wrote. “Developers will be overcome by uncertainty” if Google is torn apart, the group argues.

Buy Y Combinator, an incubator that has helped create hundreds of startups collectively worth about $800 billion filed documents pushing for the dramatic overhaul of Google, whose immense power has discouraged venture capitalists from investing in areas that are considered to be part of the company’s “kill zone.”

Startups “also need to be able to get their products into the hands of users, free from restrictive dealing and self-preferencing that locks up important distribution channels. As things stand, Google has locked up the most critical distribution channels, freezing the general search and search text advertising markets into static competition for more than a decade,” Y Combinator told Mehta.

Google will return to federal court Friday to fend off the U.S. Justice Department’s attempt to topple its internet empire at the same time it’s navigating a pivotal shift to artificial intelligence that could undercut its power.

The legal and technological threats facing Google are among the key issues that will be dissected during the closing arguments of a legal proceeding that will determine the changes imposed upon the company in the wake of its dominant search engine being declared as an illegal monopoly by U.S. District Judge Amit Mehta last year.

Brandishing evidence presented during a recent three-week stretch of hearingsJustice Department lawyers will attempt to persuade Mehta to order a radical shake-up that includes a ban on Google paying to lock its search engine in as the default on smart devices and an order requiring the company to sell its Chrome browser.

Google lawyers are expected to assert only minor concessions are needed, especially as the upheaval triggered by advances in artificial intelligence already are reshaping the search landscape, as alternative, conversational search options are rolling out from AI startups that are hoping to use the Department of Justice’s four-and-half-year-old case to gain the upper hand in the next technological frontier.

“Over weeks of testimony, we heard from a series of well-funded companies eager to gain access to Google’s technology so they don’t have to innovate themselves,” Lee-Anne Mulholland, Google’s vice president of regulatory affairs, wrote in a blog post earlier this month. “What we didn’t hear was how DOJ’s extreme proposals would benefit consumers.”

After the day-long closing arguments, Mehta will spend much of the summer mulling a decision that he plans to issue before Labor Day. Google has already vowed to appeal the ruling that branded its search engine as a monopoly, a step it can’t take until the judge orders a remedy.

While both sides of this showdown agree that AI is an inflection point for the industry’s future, they have disparate views on how the shift will affect Google.

The Justice Department contends that AI technology by itself won’t rein in Google’s power, arguing additional legal restraints must be slapped on a search engine that’s the main reason its parent company, Alphabet Inc., is valued at $2 trillion.

Google has already been deploying AI to transform its search engine i nto an answer engine, an effort that has so far helped maintain its perch as the internet’s main gateway despite inroads being made by alternatives from the likes of OpenAI and Perplexity.

The Justice Department contends a divestiture of the Chrome browser that Google CEO Sundar Pichai helped build nearly 20 years ago would be among the most effective countermeasures against Google continuing to amass massive volumes of browser traffic and personal data that could be leveraged to retain its dominance in the AI era. Executives from both OpenAi and Perplexity testified last month that they would be eager bidders for the Chrome browser if Mehta orders its sale.

The debate over Google’s fate also has pulled in opinions from Apple, mobile app developers, legal scholars and startups.

Apple, which collects more than $20 billion annually to make Google the default search engine on the iPhone and its other devices, filed briefs arguing against the Justice Department’s proposed 10-year ban on such lucrative lock-in agreements. Apple told the judge that prohibiting the contracts would deprive the company of money that it funnels into its own research, and that the ban might even make Google even more powerful because the company would be able to hold onto its money while consumers would end up choosing its search engine anyway. The Cupertino, California, company also told the judge a ban wouldn’t compel it to build its own search engine to compete against Google.

In other filings, a group of legal scholars said the Justice Department’s proposed divestiture of Chrome would be an improper penalty that would inject unwarranted government interference in a company’s business. Meanwhile, former Federal Trade Commission officials James Cooper and Andrew Stivers warned that another proposal that would require Google to share its data with rival search engines “does not account for the expectations users have developed over time regarding the privacy, security, and stewardship” of their personal information.

The App Association, a group that represents mostly small software developers, also advised Mehta not to adopt the Justice Department’s proposed changes because of the ripple effects they would have across the tech industry.

Hobbling Google in the way the Justice Department envisions would make it more difficult for startups to realize their goal of being acquired, the App Association wrote. “Developers will be overcome by uncertainty” if Google is torn apart, the group argues.

Buy Y Combinator, an incubator that has helped create hundreds of startups collectively worth about $800 billion filed documents pushing for the dramatic overhaul of Google, whose immense power has discouraged venture capitalists from investing in areas that are considered to be part of the company’s “kill zone.”

Startups “also need to be able to get their products into the hands of users, free from restrictive dealing and self-preferencing that locks up important distribution channels. As things stand, Google has locked up the most critical distribution channels, freezing the general search and search text advertising markets into static competition for more than a decade,” Y Combinator told Mehta.

Google will return to federal court Friday to fend off the U.S. Justice Department’s attempt to topple its internet empire at the same time it’s navigating a pivotal shift to artificial intelligence that could undercut its power.

The legal and technological threats facing Google are among the key issues that will be dissected during the closing arguments of a legal proceeding that will determine the changes imposed upon the company in the wake of its dominant search engine being declared as an illegal monopoly by U.S. District Judge Amit Mehta last year.

Brandishing evidence presented during a recent three-week stretch of hearingsJustice Department lawyers will attempt to persuade Mehta to order a radical shake-up that includes a ban on Google paying to lock its search engine in as the default on smart devices and an order requiring the company to sell its Chrome browser.

Google lawyers are expected to assert only minor concessions are needed, especially as the upheaval triggered by advances in artificial intelligence already are reshaping the search landscape, as alternative, conversational search options are rolling out from AI startups that are hoping to use the Department of Justice’s four-and-half-year-old case to gain the upper hand in the next technological frontier.

“Over weeks of testimony, we heard from a series of well-funded companies eager to gain access to Google’s technology so they don’t have to innovate themselves,” Lee-Anne Mulholland, Google’s vice president of regulatory affairs, wrote in a blog post earlier this month. “What we didn’t hear was how DOJ’s extreme proposals would benefit consumers.”

After the day-long closing arguments, Mehta will spend much of the summer mulling a decision that he plans to issue before Labor Day. Google has already vowed to appeal the ruling that branded its search engine as a monopoly, a step it can’t take until the judge orders a remedy.

While both sides of this showdown agree that AI is an inflection point for the industry’s future, they have disparate views on how the shift will affect Google.

The Justice Department contends that AI technology by itself won’t rein in Google’s power, arguing additional legal restraints must be slapped on a search engine that’s the main reason its parent company, Alphabet Inc., is valued at $2 trillion.

Google has already been deploying AI to transform its search engine i nto an answer engine, an effort that has so far helped maintain its perch as the internet’s main gateway despite inroads being made by alternatives from the likes of OpenAI and Perplexity.

The Justice Department contends a divestiture of the Chrome browser that Google CEO Sundar Pichai helped build nearly 20 years ago would be among the most effective countermeasures against Google continuing to amass massive volumes of browser traffic and personal data that could be leveraged to retain its dominance in the AI era. Executives from both OpenAi and Perplexity testified last month that they would be eager bidders for the Chrome browser if Mehta orders its sale.

The debate over Google’s fate also has pulled in opinions from Apple, mobile app developers, legal scholars and startups.

Apple, which collects more than $20 billion annually to make Google the default search engine on the iPhone and its other devices, filed briefs arguing against the Justice Department’s proposed 10-year ban on such lucrative lock-in agreements. Apple told the judge that prohibiting the contracts would deprive the company of money that it funnels into its own research, and that the ban might even make Google even more powerful because the company would be able to hold onto its money while consumers would end up choosing its search engine anyway. The Cupertino, California, company also told the judge a ban wouldn’t compel it to build its own search engine to compete against Google.

In other filings, a group of legal scholars said the Justice Department’s proposed divestiture of Chrome would be an improper penalty that would inject unwarranted government interference in a company’s business. Meanwhile, former Federal Trade Commission officials James Cooper and Andrew Stivers warned that another proposal that would require Google to share its data with rival search engines “does not account for the expectations users have developed over time regarding the privacy, security, and stewardship” of their personal information.

The App Association, a group that represents mostly small software developers, also advised Mehta not to adopt the Justice Department’s proposed changes because of the ripple effects they would have across the tech industry.

Hobbling Google in the way the Justice Department envisions would make it more difficult for startups to realize their goal of being acquired, the App Association wrote. “Developers will be overcome by uncertainty” if Google is torn apart, the group argues.

Buy Y Combinator, an incubator that has helped create hundreds of startups collectively worth about $800 billion filed documents pushing for the dramatic overhaul of Google, whose immense power has discouraged venture capitalists from investing in areas that are considered to be part of the company’s “kill zone.”

Startups “also need to be able to get their products into the hands of users, free from restrictive dealing and self-preferencing that locks up important distribution channels. As things stand, Google has locked up the most critical distribution channels, freezing the general search and search text advertising markets into static competition for more than a decade,” Y Combinator told Mehta.

Scientists say 4 billion people, about half the world’s population, experienced at least one extra month of extreme heat because of human-caused climate change from May 2024 to May 2025.

The extreme heat caused illness, death, crop losses, and strained energy and health care systems, according to the analysis from World Weather Attribution, Climate Central and the Red Cross.

“Although floods and cyclones often dominate headlines, heat is arguably the deadliest extreme event,” the report said. Many heat-related deaths are unreported or are mislabeled by other conditions like heart disease or kidney failure.

The scientists used peer-reviewed methods to study how much climate change boosted temperatures in an extreme heat event and calculated how much more likely its occurrence was because of climate change. In almost all countries in the world, the number of extreme heat days has at least doubled compared with a world without climate change.

Caribbean islands were among the hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme heat. Without climate change, only 48 would have occurred.

“It makes it feel impossible to be outside,” said Charlotte Gossett Navarro, chief director for Puerto Rico at Hispanic Federation, a nonprofit focused on social and environmental issues in Latino communities, who lives in the San Juan area and was not involved in the report.

“Even something as simple as trying to have a day outdoors with family, we weren’t able to do it because the heat was too high,” she said, reporting feeling dizzy and sick last summer.

When the power goes outwhich happens frequently in Puerto Rico in part because of decades of neglected grid maintenance and damage from Hurricane Maria in 2017, Navarro said it is difficult to sleep. “If you are someone relatively healthy, that is uncomfortable, it’s hard to sleep … but if you are someone who has a health condition, now your life is at risk,” Gossett Navarro said.

Heat waves are silent killers, said Friederike Otto, associate professor of climate science at Imperial College London, one of the report’s authors. “People don’t fall dead on the street in a heat wave … people either die in hospitals or in poorly insulated homes and therefore are just not seen,” he said.

Low-income communities and vulnerable populations, such as older adults and people with medical conditions, suffer the most from extreme heat.

The high temperatures recorded in the extreme heat events that occurred in Central Asia in March, South Sudan in February and in the Mediterranean last July would have not been possible without climate change, according to the report. At least 21 people died in Morocco after temperatures hit 118 degrees Fahrenheit (48 degrees Celsius) last July. People are noticing temperatures are getting hotter but don’t always know it is being driven by climate change, said Roop Singh, head of urban and attribution at the Red Cross Red Crescent Climate Centre, in a World Weather Attribution statement.

“We need to quickly scale our responses to heat through better early warning systems, heat action plans, and long-term planning for heat in urban areas to meet the rising challenge,” Singh said.

City-led initiatives to tackle extreme heat are becoming popular in parts of South Asia, North America, Europe and Australia to coordinate resources across governments and other agencies. One example is a tree-planting initiative launched in Marseille, France, to create more shaded areas.

The report says strategies to prepare for heat waves include monitoring and reporting systems for extreme temperatures, providing emergency health services, cooling shelters, updated building codes, enforcing heat safety rules at work, and designing cities to be more heat-resilient.

But without phasing out fossil fuels, heat waves will continue becoming more severe and frequent and protective measures against the heat will lose their effectiveness, the scientists said.

____

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Scientists say 4 billion people, about half the world’s population, experienced at least one extra month of extreme heat because of human-caused climate change from May 2024 to May 2025.

The extreme heat caused illness, death, crop losses, and strained energy and health care systems, according to the analysis from World Weather Attribution, Climate Central and the Red Cross.

“Although floods and cyclones often dominate headlines, heat is arguably the deadliest extreme event,” the report said. Many heat-related deaths are unreported or are mislabeled by other conditions like heart disease or kidney failure.

The scientists used peer-reviewed methods to study how much climate change boosted temperatures in an extreme heat event and calculated how much more likely its occurrence was because of climate change. In almost all countries in the world, the number of extreme heat days has at least doubled compared with a world without climate change.

Caribbean islands were among the hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme heat. Without climate change, only 48 would have occurred.

“It makes it feel impossible to be outside,” said Charlotte Gossett Navarro, chief director for Puerto Rico at Hispanic Federation, a nonprofit focused on social and environmental issues in Latino communities, who lives in the San Juan area and was not involved in the report.

“Even something as simple as trying to have a day outdoors with family, we weren’t able to do it because the heat was too high,” she said, reporting feeling dizzy and sick last summer.

When the power goes outwhich happens frequently in Puerto Rico in part because of decades of neglected grid maintenance and damage from Hurricane Maria in 2017, Navarro said it is difficult to sleep. “If you are someone relatively healthy, that is uncomfortable, it’s hard to sleep … but if you are someone who has a health condition, now your life is at risk,” Gossett Navarro said.

Heat waves are silent killers, said Friederike Otto, associate professor of climate science at Imperial College London, one of the report’s authors. “People don’t fall dead on the street in a heat wave … people either die in hospitals or in poorly insulated homes and therefore are just not seen,” he said.

Low-income communities and vulnerable populations, such as older adults and people with medical conditions, suffer the most from extreme heat.

The high temperatures recorded in the extreme heat events that occurred in Central Asia in March, South Sudan in February and in the Mediterranean last July would have not been possible without climate change, according to the report. At least 21 people died in Morocco after temperatures hit 118 degrees Fahrenheit (48 degrees Celsius) last July. People are noticing temperatures are getting hotter but don’t always know it is being driven by climate change, said Roop Singh, head of urban and attribution at the Red Cross Red Crescent Climate Centre, in a World Weather Attribution statement.

“We need to quickly scale our responses to heat through better early warning systems, heat action plans, and long-term planning for heat in urban areas to meet the rising challenge,” Singh said.

City-led initiatives to tackle extreme heat are becoming popular in parts of South Asia, North America, Europe and Australia to coordinate resources across governments and other agencies. One example is a tree-planting initiative launched in Marseille, France, to create more shaded areas.

The report says strategies to prepare for heat waves include monitoring and reporting systems for extreme temperatures, providing emergency health services, cooling shelters, updated building codes, enforcing heat safety rules at work, and designing cities to be more heat-resilient.

But without phasing out fossil fuels, heat waves will continue becoming more severe and frequent and protective measures against the heat will lose their effectiveness, the scientists said.

____

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Scientists say 4 billion people, about half the world’s population, experienced at least one extra month of extreme heat because of human-caused climate change from May 2024 to May 2025.

The extreme heat caused illness, death, crop losses, and strained energy and health care systems, according to the analysis from World Weather Attribution, Climate Central and the Red Cross.

“Although floods and cyclones often dominate headlines, heat is arguably the deadliest extreme event,” the report said. Many heat-related deaths are unreported or are mislabeled by other conditions like heart disease or kidney failure.

The scientists used peer-reviewed methods to study how much climate change boosted temperatures in an extreme heat event and calculated how much more likely its occurrence was because of climate change. In almost all countries in the world, the number of extreme heat days has at least doubled compared with a world without climate change.

Caribbean islands were among the hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme heat. Without climate change, only 48 would have occurred.

“It makes it feel impossible to be outside,” said Charlotte Gossett Navarro, chief director for Puerto Rico at Hispanic Federation, a nonprofit focused on social and environmental issues in Latino communities, who lives in the San Juan area and was not involved in the report.

“Even something as simple as trying to have a day outdoors with family, we weren’t able to do it because the heat was too high,” she said, reporting feeling dizzy and sick last summer.

When the power goes outwhich happens frequently in Puerto Rico in part because of decades of neglected grid maintenance and damage from Hurricane Maria in 2017, Navarro said it is difficult to sleep. “If you are someone relatively healthy, that is uncomfortable, it’s hard to sleep … but if you are someone who has a health condition, now your life is at risk,” Gossett Navarro said.

Heat waves are silent killers, said Friederike Otto, associate professor of climate science at Imperial College London, one of the report’s authors. “People don’t fall dead on the street in a heat wave … people either die in hospitals or in poorly insulated homes and therefore are just not seen,” he said.

Low-income communities and vulnerable populations, such as older adults and people with medical conditions, suffer the most from extreme heat.

The high temperatures recorded in the extreme heat events that occurred in Central Asia in March, South Sudan in February and in the Mediterranean last July would have not been possible without climate change, according to the report. At least 21 people died in Morocco after temperatures hit 118 degrees Fahrenheit (48 degrees Celsius) last July. People are noticing temperatures are getting hotter but don’t always know it is being driven by climate change, said Roop Singh, head of urban and attribution at the Red Cross Red Crescent Climate Centre, in a World Weather Attribution statement.

“We need to quickly scale our responses to heat through better early warning systems, heat action plans, and long-term planning for heat in urban areas to meet the rising challenge,” Singh said.

City-led initiatives to tackle extreme heat are becoming popular in parts of South Asia, North America, Europe and Australia to coordinate resources across governments and other agencies. One example is a tree-planting initiative launched in Marseille, France, to create more shaded areas.

The report says strategies to prepare for heat waves include monitoring and reporting systems for extreme temperatures, providing emergency health services, cooling shelters, updated building codes, enforcing heat safety rules at work, and designing cities to be more heat-resilient.

But without phasing out fossil fuels, heat waves will continue becoming more severe and frequent and protective measures against the heat will lose their effectiveness, the scientists said.

____

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Scientists say 4 billion people, about half the world’s population, experienced at least one extra month of extreme heat because of human-caused climate change from May 2024 to May 2025.

The extreme heat caused illness, death, crop losses, and strained energy and health care systems, according to the analysis from World Weather Attribution, Climate Central and the Red Cross.

“Although floods and cyclones often dominate headlines, heat is arguably the deadliest extreme event,” the report said. Many heat-related deaths are unreported or are mislabeled by other conditions like heart disease or kidney failure.

The scientists used peer-reviewed methods to study how much climate change boosted temperatures in an extreme heat event and calculated how much more likely its occurrence was because of climate change. In almost all countries in the world, the number of extreme heat days has at least doubled compared with a world without climate change.

Caribbean islands were among the hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme heat. Without climate change, only 48 would have occurred.

“It makes it feel impossible to be outside,” said Charlotte Gossett Navarro, chief director for Puerto Rico at Hispanic Federation, a nonprofit focused on social and environmental issues in Latino communities, who lives in the San Juan area and was not involved in the report.

“Even something as simple as trying to have a day outdoors with family, we weren’t able to do it because the heat was too high,” she said, reporting feeling dizzy and sick last summer.

When the power goes outwhich happens frequently in Puerto Rico in part because of decades of neglected grid maintenance and damage from Hurricane Maria in 2017, Navarro said it is difficult to sleep. “If you are someone relatively healthy, that is uncomfortable, it’s hard to sleep … but if you are someone who has a health condition, now your life is at risk,” Gossett Navarro said.

Heat waves are silent killers, said Friederike Otto, associate professor of climate science at Imperial College London, one of the report’s authors. “People don’t fall dead on the street in a heat wave … people either die in hospitals or in poorly insulated homes and therefore are just not seen,” he said.

Low-income communities and vulnerable populations, such as older adults and people with medical conditions, suffer the most from extreme heat.

The high temperatures recorded in the extreme heat events that occurred in Central Asia in March, South Sudan in February and in the Mediterranean last July would have not been possible without climate change, according to the report. At least 21 people died in Morocco after temperatures hit 118 degrees Fahrenheit (48 degrees Celsius) last July. People are noticing temperatures are getting hotter but don’t always know it is being driven by climate change, said Roop Singh, head of urban and attribution at the Red Cross Red Crescent Climate Centre, in a World Weather Attribution statement.

“We need to quickly scale our responses to heat through better early warning systems, heat action plans, and long-term planning for heat in urban areas to meet the rising challenge,” Singh said.

City-led initiatives to tackle extreme heat are becoming popular in parts of South Asia, North America, Europe and Australia to coordinate resources across governments and other agencies. One example is a tree-planting initiative launched in Marseille, France, to create more shaded areas.

The report says strategies to prepare for heat waves include monitoring and reporting systems for extreme temperatures, providing emergency health services, cooling shelters, updated building codes, enforcing heat safety rules at work, and designing cities to be more heat-resilient.

But without phasing out fossil fuels, heat waves will continue becoming more severe and frequent and protective measures against the heat will lose their effectiveness, the scientists said.

____

The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Scientists say 4 billion people, about half the world’s population, experienced at least one extra month of extreme heat because of human-caused climate change from May 2024 to May 2025.

The extreme heat caused illness, death, crop losses, and strained energy and health care systems, according to the analysis from World Weather Attribution, Climate Central and the Red Cross.

“Although floods and cyclones often dominate headlines, heat is arguably the deadliest extreme event,” the report said. Many heat-related deaths are unreported or are mislabeled by other conditions like heart disease or kidney failure.

The scientists used peer-reviewed methods to study how much climate change boosted temperatures in an extreme heat event and calculated how much more likely its occurrence was because of climate change. In almost all countries in the world, the number of extreme heat days has at least doubled compared with a world without climate change.

Caribbean islands were among the hardest hit by additional extreme heat days. Puerto Rico, a territory of the United States, endured 161 days of extreme heat. Without climate change, only 48 would have occurred.

“It makes it feel impossible to be outside,” said Charlotte Gossett Navarro, chief director for Puerto Rico at Hispanic Federation, a nonprofit focused on social and environmental issues in Latino communities, who lives in the San Juan area and was not involved in the report.

“Even something as simple as trying to have a day outdoors with family, we weren’t able to do it because the heat was too high,” she said, reporting feeling dizzy and sick last summer.

When the power goes outwhich happens frequently in Puerto Rico in part because of decades of neglected grid maintenance and damage from Hurricane Maria in 2017, Navarro said it is difficult to sleep. “If you are someone relatively healthy, that is uncomfortable, it’s hard to sleep … but if you are someone who has a health condition, now your life is at risk,” Gossett Navarro said.

Heat waves are silent killers, said Friederike Otto, associate professor of climate science at Imperial College London, one of the report’s authors. “People don’t fall dead on the street in a heat wave … people either die in hospitals or in poorly insulated homes and therefore are just not seen,” he said.

Low-income communities and vulnerable populations, such as older adults and people with medical conditions, suffer the most from extreme heat.

The high temperatures recorded in the extreme heat events that occurred in Central Asia in March, South Sudan in February and in the Mediterranean last July would have not been possible without climate change, according to the report. At least 21 people died in Morocco after temperatures hit 118 degrees Fahrenheit (48 degrees Celsius) last July. People are noticing temperatures are getting hotter but don’t always know it is being driven by climate change, said Roop Singh, head of urban and attribution at the Red Cross Red Crescent Climate Centre, in a World Weather Attribution statement.

“We need to quickly scale our responses to heat through better early warning systems, heat action plans, and long-term planning for heat in urban areas to meet the rising challenge,” Singh said.

City-led initiatives to tackle extreme heat are becoming popular in parts of South Asia, North America, Europe and Australia to coordinate resources across governments and other agencies. One example is a tree-planting initiative launched in Marseille, France, to create more shaded areas.

The report says strategies to prepare for heat waves include monitoring and reporting systems for extreme temperatures, providing emergency health services, cooling shelters, updated building codes, enforcing heat safety rules at work, and designing cities to be more heat-resilient.

But without phasing out fossil fuels, heat waves will continue becoming more severe and frequent and protective measures against the heat will lose their effectiveness, the scientists said.

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The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

Fancy a new tablet without paying a penny for the privilege? That’s exactly what Sky is dishing out right now. The UK mobile network is offering customers a feature-packed Galaxy Tab A9+—worth £259—for free. It’s an eye-catching promotion, especially with the Galaxy A9+ featuring a pixel-packed 11-inch screen, Dolby Atmos audio, 128GB of storage, and a speedy processor.

Now, you might be wondering what the catch is. Clearly, Sky isn’t just giving these devices away without getting anything in return.

To claim, all you have to do is buy a Galaxy S25 smartphone on contract, and you’ll then be sent the Tab A9+ as an added bonus. Sky Mobile prices for this flagship call maker start from just £36 per month which includes unlimited calls, texts and 3GB of data.

That’s based on a 36-month contract, although you can swap the phone after just two years.

YOU CAN SEE THE SKY DEAL HERE

Sky isn’t the only retailer offering this free tablet deal, with Mobiles.co.uk also joining the party. This service offers the S25 for just £24.99 per month (£29 upfront fee) and only requires you to sign up for 24 months.

YOU CAN SEE THE MOBILES.CO.UK DEAL HERE

If you simply want to buy the phone SIM free you can head straight to Samsung’s website with the Korean technology giant not only giving away the Tab A9+ with its S25 bit also offering huge discounts when you trade in an older phone.

In fact, there’s a guaranteed £200 off when you hand over any phone in any condition.

That means you could take delivery of this flagship for just £599 and still claim that tablet.

YOU CAN SEE THE SAMSUNG DEAL HERE

As a quick reminder, the Galaxy S25 is Samsung’s very latest call maker. It comes with a 6.2-inch screen, fast Snapdragon processor, triple lens camera and full access to Galaxy AI.

This smart feature can rewrite emails, edit photos, sort inboxes and search the web just by circling an image on the screen.

Want to know more? Read our full Galaxy S25 review here.

This freebie deal is clearly enticing, but there is one thing to be aware of. Samsung is also about to launch a skinny version of this phone called the S25 Edge.

This device gets a sleek design but with the same amount of power under its hood. It also has a 6.7-inch display, dual-lens camera and that same Galaxy AI built in.

Express.co.uk has already had this phone in our hands, and here’s our full Galaxy S25 Edge review.