Overview
- World Weather Attribution cataloged 157 major disasters in 2025 and conducted in-depth analyses of 22 events.
- Of the cases studied, 17 were found to be made more likely or more severe by climate change, with several heatwaves up to 10 times more likely than a decade ago.
- Heat was the deadliest hazard, with one European summer heatwave estimated to have caused about 24,400 deaths.
- Exceptionally high temperatures persisted despite La Niña, which researchers linked to continued fossil-fuel emissions.
- The report warns millions are nearing limits of adaptation and notes COP30 ended without an explicit fossil-fuel phaseout plan.