Four fire engines and around 25 firefighters tackled a grass fire near Berwick Pond Road in Rainham.
An area of grassland 100x30 metres was destroyed by the fire. There were no reports of any injuries.
The Brigade was called at 2037 and the incident was over for firefighters at 2117. Crews from Wennington, Dagenham, Harold Hill and Barking Fire Stations attended the scene.
Today's fire comes as London experiences one of the hottest days of the year. During this type of weather, the risk of grass fires increases and the Brigade is asking the public to follow crucial safety advice that will help protect themselves, others, the environment and their property.
London Fire Brigade Assistant Commissioner for Prevention and Protection, Craig Carter, said: "We know many Londoners will want to enjoy the nice weather by visiting a park or open space. However, we’re asking people not to take disposable barbecues with them as they can cause grass fires, especially in hot weather when the ground is dry. These fires are unpredictable and can spread rapidly, causing a significant amount of damage.
"Don’t be tempted to barbecue on your balcony either. Balconies can contain combustible materials which can pose a risk to those barbecuing and others living nearby.
"If you are having a barbecue, never leave it unattended and be careful where it’s positioned. Aim for level ground and keep barbecues well away from anything flammable like sheds, fences, trees or tents."
As well as disposable barbecues, discarded smoking materials and leftover rubbish also pose a huge fire risk. People are asked to ensure their rubbish is placed securely inside a bin or to take it home with them. If you have had a cigarette, please make sure that it is completely out.