Two fire engines and around 10 firefighters were called to a fire at a house in Titchfield Road in Enfield.
Part of the ground floor of the property was damaged by fire. Three people were rescued from a first floor bedroom via an internal staircase by firefighters wearing breathing apparatus.
The Brigade was called at 0254 and the fire was under control at 0335. Fire crews from Enfield fire station attended the scene.
The cause of the fire was accidental and due to a fault in a dishwasher.