Six fire engines and around 40 firefighters tackled a grass fire on Dudley Road in Feltham.
Around two hectares of grass was damaged by fire. There were no reports of any injuries.
The Brigade’s 999 Control Officers took 25 calls to the blaze.
London Fire Brigade’s Assistant Commissioner, Pat Goulbourne, said: “The Met Office has issued a warning for extreme heat on Monday and Tuesday and we’re urging people to continue to take extra care and help us prevent fires on open land.
“Make sure rubbish, especially glass, is safely thrown away and cigarettes are always properly disposed of. Grass will be tinder dry after such hot weather, so please don’t have barbecues in parks and public spaces.
"Disposable barbecues that have been abandoned can still end up causing a fire as hot coals can smoulder and pose a real fire risk for some time after the flames die down – they need to be put right out and cooled before being safely thrown away.”
The Brigade was called at 1625 and the fire was under control by 1802. Fire crews from Heston, Feltham, Twickenham, Acton and surrounding fire stations attended the scene.