Firefighters are reminding people to store items carefully and away from electrical sources after a light bulb igniting a quilt in a cupboard caused a fire at a flat on Holbrooke Court, Holloway.
A London Fire Brigade spokesperson said: "Light bulbs can get incredibly hot and set fire to materials.
"It's important to keep them well away from anything that might catch fire such as books, paper, wood and fabric.
"Keep clothing, sheets and curtains well away too and always turn lights off when you leave the room."
Half of a ground floor flat was damaged by fire. Three women left the flat before the arrival of the Brigade and they were treated at the scene for smoke inhalation by London Ambulance Service crews.
Firefighters led two women and two infants to safety from the second floor via an external staircase.
The Brigade was called at 2304 and the fire was under control at 0017. Two fire engines and around 10 firefighters from Holloway and Kentish Town fire stations attended the scene.