The first yellow heat-health alerts have been issued for 2025 while the Met Office is also warning of thunderstorms which will bring frequent lightning, gusty winds, hail and torrential downpours.
Some communities could be hit with more than half a month’s worth of rain in the space of a few hours, with some flash flooding likely from the biggest storms.
The health alerts, issued by the UK Health Security Agency (UKHSA),, external cover the east of England, London, East Midland and south-east England from 21:00 BST on Thursday until 08:00 on Sunday.
Temperatures are expected to surge to 30C (86F) in parts of eastern England with the heat and humidity combining to bring thunderstorms.
