Yellow heat health alerts have been issued for most of England with temperatures set to climb as high as 33C by the weekend.

​

Yorkshire and The Humber, East Midlands, West Midlands, East England, the South East, the South West and London are all covered by the alert which comes into force at 12:00 BST on Wednesday and lasts until 18:00 BST on Sunday. Temperatures are set to be as high as 28C in London on Tuesday, with an area of high pressure building across the UK likely to bring the first heatwave of 2025 later in the week.

​

A yellow alert is the lowest behind amber and red on the UK Health Security Agency's (UKHSA) system, but warns of possible impacts on health and social services. Temperatures across the UK will continue to climb with the weather becoming increasingly hot and sunny, meaning it is likely heatwave conditions are met in some parts at the end of the week and into the weekend - although there is a chance it could extend into next week.

​

Temperatures in many parts of the UK will range between 25C and 30C, with some areas potentially reaching up to 33C, for example in London. While such heat is not unprecedented this early in the summer, it is still considered quite intense. The UK's June temperature record stands at 35.6C, set in Southampton in 1976, and current forecasts suggest that this record is unlikely to be broken this time. The UKHSA said an increase in demand for health services by vulnerable people is likely, as well as an increase in risk to health for individuals aged over 65 years or those with pre-existing health conditions, including respiratory and cardiovascular diseases.

​

Little rain is forecast throughout the period, however the high temperatures may trigger a few isolated but intense thunderstorms on Saturday and Sunday, potentially occurring almost anywhere in the UK. The heatwave is expected to break down into next week, although southern areas of the UK may remain very warm.