The UK is likely to experience its fifth widespread heatwave of the year next week, with temperatures potentially reaching 35C in parts of southeast England, according to the Met Office.
Heat will build across the country from Sunday, with temperatures expected to exceed 30C in the southeast. Yellow heat health alerts have been issued by the UK Health Security Agency (UKHSA) for several regions, urging people to stay hydrated and check on vulnerable individuals.
The Met Office defines a heatwave as when a location records at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave threshold (typically 25C to 28C depending on the region). The previous four heatwaves this year have already made 2026 one of the warmest years on record for the UK.
Forecasters warn that the hot conditions could bring health risks, especially for the elderly and those with pre-existing conditions. Local authorities are preparing to open cooling centers and provide support to rough sleepers.
While the heat is expected to peak mid-week, there is uncertainty about how long it will last. The Met Office advises people to follow weather updates and take precautions during the hottest parts of the day.
