Extreme heat linked to deaths of over 40,000 people in England since 1988
Over 40,000 excess deaths occurred in England on the hottest days between 1988 and 2025, according to Office for National Statistics (ONS) data. These figures exclude the current summer, which is on track for record heat-related fatalities, with 2,877 deaths already attributed to heatwaves in May and June.

Briefing Summary
AI-generatedOver 40,000 excess deaths occurred in England on the hottest days between 1988 and 2025, according to Office for National Statistics (ONS) data. These figures exclude the current summer, which is on track for record heat-related fatalities, with 2,877 deaths already attributed to heatwaves in May and June. The UK Health Security Agency reported this figure, nearly double the total for summer 2025. London experienced the highest number of deaths linked to high temperatures. While historically cold weather caused more deaths, the proportion associated with hot days has increased, narrowing the gap. This trend is expected to worsen due to the climate crisis and an aging population, with vulnerable groups like the elderly and children being most at risk.
Article analysis
Model · rule-basedKey claims
5 extractedOver 40,000 more people died on the hottest days in England between 1988 and 2025 than would be expected.
The heatwave that scorched western Europe in late June was the most severe and widespread ever recorded and was only possible due to the climate crisis driven by fossil fuel burning.
Emergency departments in England’s hospitals have experienced their busiest period ever this summer, with almost 2.5 million patients attending A&E each month in May, June and July.
The number of people dying prematurely due to high temperatures is expected to rise further as the climate crisis continues to push up temperatures and the population ages.
At least 35,000 more people died in continental Europe during the summer than would normally be expected.