Four fire engines and 21 firefighters and officers were called to a fire at a block of flats in Barge Walk in Greenwich.
Part of a first floor flat was damaged by fire. Two adults and two children left the affected property before the arrival of the Brigade. A further 20 residents from neighbouring properties also left the building before the arrival of the Brigade.
The Brigade was called at 0912 and the fire was under control at 1012. Fire crews from East Greenwich, Greenwich and Poplar fire stations attended the scene.
The cause of the fire is under investigation.