Six fire engines and around 40 firefighters were called to a grass fire on Farm Road in Rainham.
Around three hectares of grass and shrubland were damaged by fire. There were no reports of any injuries.
A London Fire Brigade spokesperson said: "The Brigade's Control Officers took 10 calls to the fire. If you see a grass fire, call the Brigade straight away and let us know where it is. Never attempt to tackle it yourself as grass fires can travel very quickly and change direction without warning."
The Brigade was called at 1101 and the fire was under control by 1302. Fire crews from Hornchurch, Wennington, Romford, East Ham, Dagenham and Ilford fire stations attended the scene.
The cause of the fire is under investigation.