The fire service in Surrey has declared a major incident as crews battle an open fire.
Writing on Twitter, the Surrey Fire and Rescue said: “We have several fire engines in attendance.
“There is a great deal of smoke so please avoid the area, windows and doors should be closed if nearby and pets kept indoors. More info to follow.”
Read more: Dramatic satellite pictures show the impact of the heatwave as high temperatures hit country
The fire is at Hankley Common near Farnham, with pictures on social media showing smoke filling the sky as far away as Guildford.
It comes after a swathe of wildfires in London and the surrounding area after last weeks record temperatures left the ground tinder-box dry.
Fire crews in London are also battling wildfires – with blazes in Rammey Marsh in Enfield, and Cranford Park in Hayes.
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The UK hit record temperatures on Tuesday, with Coningsby in Lincolnshire reaching a sweltering 40.3C (104.5F) – the first time since records began that the mercury has exceeded 40C in the country.
Some parts of the UK saw significant damage as a result of the extreme heat, such as house and wildfires, melting airport runways and expanding railway tracks.
