More than 2,700 people may have died from heat-related causes in England and Wales during the extreme heatwaves in May and June 2026, according to estimates from a team at Imperial College London, the Met Office, and the London School of Hygiene and Tropical Medicine. The analysis indicates that most fatalities occurred during the record-breaking heat of June, when temperatures soared to 37.7C (99.9F) at Lingwood, Norfolk.
Impact of the Heatwaves on Public Health
The study estimates that approximately 550 deaths were attributed to the heat between May 21 and May 29, with nearly 2,200 fatalities recorded from June 18 to June 28. The unprecedented temperatures were exacerbated by a phenomenon known as a heat dome, which trapped hot air over the region. This year marked the warmest June on record in England, surpassing the previous high of 35.6C set in 1957.
According to experts, the extreme heat can lead to various health issues, including heart attacks and strokes, particularly affecting vulnerable populations such as the elderly and those with pre-existing health conditions. Prof Fredi Otto from Imperial College emphasized, "Don't underestimate the risks. Just because you're fit and healthy, you're not safe." This statement highlights the seriousness of the health risks posed by extreme temperatures.
The Role of Climate Change in Extreme Heat Events
The researchers noted that human-induced climate change has contributed to a global temperature increase of approximately 1.4C since pre-industrial times, which has intensified heatwaves. They estimate that climate change added between 3C and 4C to the maximum temperatures recorded during the recent heatwaves. With more frequent and severe heatwaves predicted, experts warn that heat-related deaths could rival cold-related fatalities in the future if climate emissions are not curtailed.
