Eight fire engines and around 60 firefighters were called to a fire at a maisonette in Chaucer Gardens in Sutton.
Half of a six-roomed maisonette on the 10th and 11th floors of an 18 storey block was damaged by the fire. Around 20 people left the building before the arrival of the Brigade and a further 40 were led from the building by firefighters. There were no reports of any injuries.
The Brigade's 999 Control Officers took 9 calls to the fire.
The Brigade was called at 1005 and the fire was under control at 1126. Fire crews from Sutton, Mitcham, Wallington, Wimbledon, Croydon and surrounding fire stations attended the scene.
The cause of the fire is believed to have been combustible materials coming into contact with an incandescent light bulb in a cupboard.