Six fire engines and around 40 firefighters were called to a grass fire at a sports centre in Windmill Lane in Southall.
Around six hectares of grassland, roughly the same size as six football pitches, were damaged by fire. The Brigade's 999 Control Officers received 18 calls to this fire.
The Brigade was called at 2347 and the fire was under control at 0149. Fire crews from Southall, Ealing and Heston fire stations attended the scene.