Firefighters were called to a grass fire by Wigley Road in Feltham on Saturday.
A area of grassland measuring 40 by 20 metres was damaged by fire.
The Brigade was called at 1814 and the fire was brought under control by 1914.
Five fire engines and around 35 firefighters from Battersea, Kingston, Sutton, Hillingdon attended the incident. Crews were supported by one fire engine from Surrey Fire and Rescue Service.
A London Fire Brigade spokesperson said: "During the hot weather we are attending a large number of grass fires across London.
"We’re asking the public to take care not to drop cigarettes or matches on dry grass and to keep a very close eye on barbecues.
"Dropped glass can also start fires as the sun can magnify the sun’s rays.
"Grass fires can quickly spread and cause serious damage, so if you see grass smouldering, please call 999 immediately.”
The Brigade’s tips on preventing grass fires are as follows:
The Brigade was called at 1532 and the fire was under control at 1647. Fire crews from Orpington, Bromley and Addington fire stations attended the scene.