Overview
- The Spanish Health Ministry announced on Wednesday that an estimated 101 people died in May from heat-related causes, the highest May total since monitoring began.
- That figure comes from Momo, a national excess-death system that compares observed daily deaths with an expected historical baseline rather than assigning cause on a case-by-case basis.
- Aemet, the national weather service, confirmed several cities — especially in northern Spain — experienced unusually high temperatures and local May records over several days.
- Longer-term monitoring since 2015 has attributed 27,564 deaths to high temperatures through summer 2025, with 2022 and 2025 the deadliest single years to date.
- Authorities maintain a green-to-red heat-alert scale to guide public warnings and health responses, and officials warn that earlier heat episodes could increase pressure on hospitals and vulnerable people if the summer proves hotter than average.