Thousands may have died in UK's exceptional May and June heatwaves
Summary
Experts estimate that over 2,700 people may have died from heat-related causes during unusually hot weather in the UK in May and June. The heatwaves were caused by a “heat dome” made worse by human-driven climate change, setting new temperature records and increasing health risks.Key Facts
- The UK recorded its warmest June ever, with temperatures reaching 37.7°C (99.9°F) in Norfolk.
- A red heat alert was issued in parts of England and Wales, warning of serious risks even to healthy people.
- May 2026 saw temperatures hit 35.1°C, breaking a century-old record.
- The heat dome, a high-pressure system trapping hot air, was intensified by climate change adding 3-4°C to temperatures.
- Heatwaves caused physical stress, especially for babies, older adults, and those with health problems, increasing risks of heart attacks and strokes.
- The humid conditions in June made it harder for bodies to cool down by sweating.
- Death estimates are based on modeling using past data and may change as more information becomes available.
- Heatwaves are expected to become more frequent and severe unless global greenhouse gas emissions decrease.
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