Firefighters are warning smokers to dispose of smoking materials carefully after a fire at a house on Rodenhurst Road in Clapham Common.
There was a small fire in a first-floor bedroom. A woman was treated on scene by London Ambulance Service crews.
The fire is believed to have been accidental and caused by the unsafe disposal of smoking materials.
A London Fire Brigade spokesperson said: "If you're a smoker, it’s absolutely vital you ensure your cigarette is completely out when you’ve finished smoking it. If you don’t, you risk causing a fire which could not only destroy your home, but also cost you your life.
“Firefighters recommend that you have a look at our online Home Fire Safety Checker to make sure there are no hidden hazards in your home.
“The online tool will ask you a series of questions that will help us work out the level of risk in your home, or the home of someone you care for. It only takes a few minutes to get tailored advice to keep yourself and loved ones safe from fire.”
The Brigade was called at 0203 and the fire was under control by 0223. Three fire engines and around 15 firefighters from Clapham and Tooting fire stations attended the scene.