TL;DR, July 3 -- England recorded its hottest-ever June temperature, 36.1degC in Gosport, Hampshire, on June 24, 2026, as the UK Health Security Agency extended a rare Red heat-health alert until 11pm on Friday, June 26. London Ambulance Service logged 642 life-threatening Category 1 calls that day, its fifth-busiest in history, and deployed more than 400 additional crews. The key difference from 2022: dew points near 22degC prevent sweat from evaporating, raising heat stress risk even in healthy adults not yet acclimatised to summer heat.

LONDON - By the time the call volume stopped climbing on Wednesday night, London Ambulance Service had handled 7,900 calls and sent crews to nearly 3,600 patients in a single day. Of those responses, 6...