An estimated 2,877 heat-related deaths occurred in the United Kingdom during heatwaves in May and June, nearly doubling last year's figures, according to a preliminary assessment by the UK Health Security Agency (UKHSA).

The agency reported an estimated 753 deaths were associated with the heatwave from May 24-27 and an additional 2,124 deaths with the period of extreme heat from June 21-28. Both temperature spells broke monthly records for the UK, with a high of 31.5C (88.7F) recorded in Kew Gardens on May 26 and 38.0C in Lingwood, Norfolk, on June 26.

"Based on the interim data, it is likely that 2026 could see the highest number of heat-associated deaths on record," the UKHSA stated. Definitive figures are anticipated in early 2027. The previous record was set in 2022 with 2,985 recorded deaths.

Dr. Ross Thompson, an author of the UKHSA report, emphasized the significant health risks posed by very hot weather, particularly for vulnerable populations like older adults and individuals with pre-existing medical conditions. He noted that as the climate warms, periods of hot weather are expected to become longer, more frequent, and more severe, underscoring the need for national preparedness.

Parts of the UK experienced another heatwave in late July, with temperatures reaching 35.2C in Writtle, Essex, on Wednesday. Cooler conditions and some rain were anticipated for the end of the week, though potentially not in the driest regions.

Drought conditions were declared across more than half of England in late July, a consequence of hot, dry weather depleting the country's water supplies. The Environment Agency indicated that the drought encompasses much of central, eastern, and southern England, with water being used faster than natural replenishment.

Health Secretary Yvette Cooper acknowledged the severe impact of the summer's heatwaves on public health and the National Health Service (NHS). She expressed condolences to those who lost loved ones and thanked NHS staff, care workers, and emergency responders for their tireless efforts during the exceptionally busy and challenging months.

The UK was not alone in experiencing extreme temperatures this summer; much of western Europe also faced record-breaking heat. In the preceding week, deadly wildfires impacted regions of France, Spain, and Greece, forcing tens of thousands of people to evacuate their homes.