Four fire engines and 21 firefighters and officers were called to a fire at a mid-terraced house in Coborn Road, Bow on Sunday.
A small portion of the ground floor and the roof of the property were damaged by fire.
A 20 kilogram light portable gas cylinder was cooled and removed from the scene by firefighters.
One man was taken to hospital by London Ambulance Service.
The Brigade was called at 1454 and the fire was under control at 1620. Fire crews from Whitechapel, Shadwell, Dowgate and Dockhead fire stations attended the scene.
The cause of the fire is under investigation.