Four fire engines and around 25 firefighters tackled a fire at a flat above a shop on Uxbridge High Street.
Part of a four-roomed flat on the third floor of the building was damaged by fire. Firefighters wearing breathing apparatus led a woman to safety who was treated on scene by London Ambulance Service crews.
The Brigade’s 999 Control Officers gave vital fire survival guidance to those inside on how to stay safe before firefighters arrived.
Fire investigators believe the cause of the fire is due to a candle being too close to combustible items.
A London Fire Brigade spokesperson said: “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.”
Firefighters’ candle safety tips
The Brigade was called at 0702 and the fire was under control by 0758. Fire crews from Hillingdon, Ruislip, Hayes and Heathrow fire stations attended the scene.