Overview
- World Weather Attribution reports that 2025 ranked in the top three hottest years, with the three-year global average surpassing the Paris Agreement’s 1.5°C threshold despite La Niña conditions.
- Researchers cataloged 157 high-impact disasters and conducted 22 attribution studies, concluding many events were made more likely or more severe by human-caused warming.
- Heatwaves were the deadliest hazards, with one European summer heatwave estimated to have caused 24,400 deaths.
- Some 2025 heatwaves were up to 10 times more likely than a decade ago, highlighting how quickly extreme heat risk is escalating.
- The report warns millions are nearing limits of adaptation and follows COP30’s failure to secure a fossil-fuel phaseout, underscoring urgent needs for rapid emission cuts, stronger adaptation and better early-warning systems.