Six fire engines and around 40 firefighters were called to a fire in a shop basement on Munster Road in Fulham.
Half of the shop storage area in the basement, the staircase leading from the basement to the ground floor, and the ground floor were destroyed by fire.
One woman left before the Brigade arrived. Two women and a child were assisted to safety from a first floor balcony at the rear of the property via a short extension ladder. One woman was treated on scene by London Ambulance Service for smoke inhalation. One woman and the child were taken to hospital by London Ambulance Service.
The fire is is being treated as accidental and is believed to have been caused by the unsafe use of candles.
"Candles, incense sticks and oil burners are one of the most common causes of fire. It’s really important that you never leave a candle unattended and keep them away from anything that can easily catch fire.
"You should also ensure they are in a heat-resistant holder and placed on a stable surface, so they won’t be knocked over."
The Brigade was called at 0807 and the fire was under control by 0903. Fire crews from Fulham, Hammersmith, Chelsea, Wandsworth and Kensington fire stations were in attendance.