An estimated 2,877 deaths in the UK were associated with extreme heat in May and June 2026, nearly double the 1,504 heat-related deaths recorded during the same period in 2025, according to the UK Health Security Agency (UKHSA).
Two heatwaves drive surge in fatalities
The UKHSA reported that 753 deaths were linked to a heatwave from 24 to 27 May, while 2,124 deaths were associated with a second period of unusually hot weather between 21 and 28 June. These figures are interim, with the official number yet to be confirmed, but they are already approaching the annual record for heat-related deaths set in 2022.
Dr Ross Thompson, UKHSA’s principal environmental public health scientist and author of the report, said: “These figures highlight the significant danger that very hot weather can pose to people’s health. This is particularly true for those who are more vulnerable including older adults and people with underlying medical conditions. While the figures are interim, they suggest that, if we experience more periods of hot weather this summer, we could see the highest number of heat-associated deaths on record.”
Four heatwaves hit UK summer
The data covers only two of the four heatwaves that have struck the UK this summer. A third heatwave in early July prompted multiple yellow and amber health warnings from the UKHSA. A fourth heatwave is ongoing, with wildfires breaking out across the country, including near a nuclear plant in Suffolk where holiday homes and residential properties were evacuated.
Drought and agricultural impact
More than half of England is experiencing drought due to the hot, dry conditions. The Environment Agency (EA) stated that much of central, eastern and southern England is affected, and further restrictions on water use, such as additional hosepipe bans, may be introduced. Farmers have reported depleted crop levels, with Gavin Lane, president of the CLA (Country Land and Business Association), which represents 28,000 farmers, warning: “Farmers are telling us this is the worst harvest in years. A sodden winter followed by drought has left wheat at half its usual height and some crops not worth harvesting.”
Government response and public health advice
Health and Social Care Secretary Yvette Cooper commented: “The sweltering heat has had a serious impact this summer on people’s health and on our NHS. For many years, we have been used to winter pressures in our NHS and the need to support those who are vulnerable in the coldest weather. But now we are seeing the summer heat have an increasingly serious impact on the health of thousands of people, and on the pressures facing our NHS too. As we move through the summer, it is so important for people to be able to look out for their health and help those who are more vulnerable to the hot conditions. Please don’t hesitate to seek help if you’re worried about your own wellbeing, or anyone else’s. A little care could make a lifesaving difference.”
