Overview
- The UK Health Security Agency published interim figures on Thursday showing an estimated 2,877 excess deaths linked to two heat episodes in May and June 2026.
- UKHSA attributes about 753 deaths to the early May episode (24–27 May) and about 2,124 deaths to the prolonged June heatwave (21–28 June), which triggered a rare red heat-health alert.
- The agency calculates heat-associated excess mortality by comparing average deaths on days when the England mean temperature exceeded 20°C with averages on cooler days, and it describes the current numbers as provisional.
- Hospitals reported critical incidents and the London Ambulance Service logged record numbers of life‑threatening emergencies during the June spell, reflecting clear strain on NHS and emergency services.
- UKHSA and ministers say the figures highlight the danger to older and clinically vulnerable people, warn 2026 could exceed the 2,985 heat-associated deaths recorded in 2022, and urge urgent preparedness and targeted protection.