UKHSA report shows 2,877 excess deaths caused by May and June heatwaves

• Heat-related excess mortality in May-June showed a substantial year-on-year increase from 1,504 deaths (summer 2025) to 2,877 deaths, nearly doubling the previous burden
• High ambient temperatures represent a significant public health threat requiring enhanced clinical vigilance for heat-related illness presentations
• Current heatwave response measures require evaluation given the marked increase in excess mortality, warranting consideration of strengthened prevention and management protocols

The 2,877 excess deaths represents a significant increase on the 1,504 excess deaths observed in summer 2025.

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