Overview
- A Climate Impact Lab report published Wednesday projects roughly 450,000 to 451,000 excess deaths worldwide linked to heat driven by the current super El Niño.
- The estimate comes from validated, empirical models that link monthly temperature anomalies to excess mortality across 24,378 subnational regions and then apply El Niño temperature forecasts.
- Tropical and lower-income areas are expected to bear the worst tolls, with Nigeria, Indonesia, the Sahel, India, Sudan and Brazil among the highest; the United States ranks in the top 20 with about 3,500 projected additional deaths.
- Reports disagree on the exact window covered by the estimate—some cite June 2026–February 2027 while others cite September–February 2027—but authors warn elevated heat-related mortality could persist into mid-2027.
- Researchers urge immediate targeted steps such as improved forecasts, cooling centers, extra medical staffing during hot periods and protections for outdoor workers to reduce avoidable deaths and ease pressure on health and emergency systems.