Four fire engines and around 25 firefighters were called to a fire at a lean-to shelter at the rear of shops on Stamford Hill.
A single storey lean-to shelter was destroyed by fire. One man was treated on scene by London Ambulance Service crews and taken to hospital.
The Brigade's 999 Control Officers took nine calls to the blaze.
The Brigade's Fire Investigators believe the fire was caused by an unattended candle.
A London Fire Brigade spokesperson said: “Candles 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 else that can easily catch fire.”
Top candle safety tips
The Brigade was called at 0109 and the fire was under control by 0239. Fire crews from Stoke Newington and Tottenham fire stations attended the scene.