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Heatwaves cause almost double the excess deaths in England

scienceJul 30, 202615185

The UK Health Security Agency estimates 2,877 heat-associated deaths in England during the May and June 2026 heatwaves, almost double the total for the whole summer of 2025 and close to the 2022 record of 2,985 with August still to come. UKHSA attributes 753 deaths to the 24, 27 May heatwave and 2,124 deaths to the 21, 28 June event, calculating excess mortality relative to similar calendar periods without heatwaves. The agency says its figures are based on recorded deaths and align with a separate 13 July estimate that used a different method; small revisions are possible when full death records arrive. Health secretary Yvette Cooper and UKHSA principal scientist Dr Ross Thompson warned the heatwaves placed heavy strain on the NHS and emergency services, with some ambulance services reporting record call volumes. Meteorological highs included 38C at Lingwood, Norfolk in June and 31.5C at Kew Gardens in May. UKHSA and Imperial College co-author Dr Garyfallos Konstantinoudis called the numbers tragic confirmation of extreme heat’s health impact and urged adaptation of homes, care settings, and infrastructure while accelerating efforts to reach net zero. The agency warned that as the climate warms, periods of very hot weather will become longer, more frequent, and more extreme, increasing the risk that England will record its highest-ever heat-related death toll this summer.

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