Four fire engines and around 25 firefighters attended a house fire on Percy Road in South Norwood.
The first floor of a mid-terraced house was damaged by fire along with part of the ground floor. Three people were assessed at the scene by London Ambulance Service and taken to hospital.
The Brigade received the first of seven calls about the fire at 0905 and Control Officers mobilised crews from Woodside, Beckenham and West Norwood fire stations to the scene. The fire was extinguished by 1008.
The fire is believed to have been caused by a fault with a phone charger.