The heatwave has set a new record for the highest temperature ever recorded in Slough.

A provisional temperature of 40.2C was recorded at Heathrow at 12.50pm today which, if confirmed, will beat the previous record of 38.7C set in 2019 by 1.5C.

Met Office reported that for the first time ever, 40C has provisionally been exceeded in the UK.

And temperatures are still climbing in many places so the Met Office is telling people to be aware of the heat.

READ MORE: Live updates: 'Danger to life' RED weather warning continues in Berkshire

The Met Office tweeted: "For the first time ever, 40 Celsius has provisionally been exceeded in the UK.

"London Heathrow reported a temperature of 40.2°C at 12:50 today.

"Temperatures are still climbing in many places, so remember to stay #WeatherAware."

Looking ahead to this evening, there will be another warm night with a minimum temperature of 17C.

And on Wednesday, Met Office is predicting temperatures of around 28C and it will be cloudier overall with some outbreaks of rain.

Met Office Chief Meteorologist Neil Armstrong, said “We are continuing to see exceptional temperatures in the UK today and it is important people plan for the heat and consider changing their routines. This level of heat can have adverse health effects.”

“Along with the extreme heat we are now seeing an increasing risk of thunderstorms particularly in the Northeast of England this afternoon (Tuesday) and in the south tomorrow (Wednesday).”