Today is expected to be the hottest day of the year.
The Met office has issued a yellow level two heatwave warning, with temperatures expected to rise to 28 degrees.
But the weather could break dramatically later, with the threat of thunderstorms this evening.
Doctors say it's important to be aware of the impact heat can have on health.
Britain is set to bask in the sunshine in the next few days with health officials issuing guidance on how to stay safe in the sunshine.
Nottingham GP Dr Ian Campbell talks about how to be prepared for the heatwave