US EditionHalf of world’s population endured extra month of extreme heat due to climate change, experts say
- Between May 2024 and May 2025, about half of the global population—approximately 4 billion people—faced an additional month of unusually intense heat as a result of human-driven climate change.
- Researchers analyzed temperature data using peer-reviewed methods and found that human-caused climate change doubled extreme heat days in almost all countries.
- The extreme heat led to health problems, fatalities, damage to crops, and placed significant pressure on energy and healthcare services, disproportionately affecting low-income and vulnerable groups.
- In July, temperatures in Morocco soared to 48 degrees Celsius, resulting in the deaths of at least 21 people, while municipal efforts across various regions are increasingly focused on enhancing communities' ability to withstand extreme heat.
- Experts emphasize that unless fossil fuel use is gradually eliminated, the intensity and frequency of heat waves will increase, diminishing the effectiveness of current protective measures, and they stress the urgent need to expand heat response strategies and improve early warning systems.
75 Articles
75 Articles
Attributing physical and biological impacts to anthropogenic climate change
Significant changes in physical and biological systems are occurring on all continents and in most oceans, with a concentration of available data in Europe and North America. Most of these changes are in the direction expected with warming temperature. Here we show that these changes in natural systems since at least 1970 are occurring in regions of observed temperature increases, and that these temperature increases at continental scales cannot…
Why 4 billion people faced an extra month of extreme heat over the last year
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 …
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