Eight fire engines and around 60 firefighters were called to a fire in a block of flats in Warton Road, Stratford.
Part of a three room flat on the second floor was damaged by fire. Two people left the flat before crews arrived and around 100 people also left the building before the Brigade arrived. There were no reports of any injuries.
The Brigade was called at 0952 and the fire was under control by 1042. Fire crews from Stratford, Poplar, Leytonstone, Plaistow and surrounding stations were at the scene.
The fire is believed have been accidental and caused by an electrical event in a consumer unit.