Three fire engines and around 15 firefighters tackled a fire at a flat on London Road in Enfield.
A small part of a first floor flat of a three-storey residential building was damaged by the fire. One man and one woman suffering from smoke inhalation were led to safety by fire crews wearing breathing apparatus and were treated on scene by London Ambulance Service.
The fire is being treated as accidental and is believed to have been caused by the unsafe disposal of smoking materials.
A London Fire Brigade spokesperson said: “We’d rather you didn’t smoke at all, but if you are 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.
“This incident is timely reminder about the importance of having smoke alarms in your home. Not having working smoke alarms leaves you and your loved ones at risk.”
The Brigade was called at 1337 and the fire was under control at 1408. Fire crews from Tottenham and Barnet fire stations attended the scene.
A London Fire Brigade spokesperson said: “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.”