About 140 firefighters are battling a blaze at a warehouse in north London.
Twenty fire engines were sent to the scene of the fire on White Hart Lane in Tottenham, London Fire Brigade said.
Smoke could be seen rising from the area, while footage from the scene shows the large building well alight.
One person was taken to hospital with burns to the hand, and the fire service said crews would work “hard through the night to bring this blaze under control”.
One Twitter user described a “crazy” fire while another reported a helicopter flying over the White Hart Lane recreational ground.
Fire brigade station manager Sam Kazmanli, at the scene, said: “This is a large fire, cylinders are involved so a hazard zone has been set as cylinders can explode when exposed to heat.
“There is a lot of smoke in the air. As a precaution, local residents are advised to keep their windows and doors closed.”
Firefighters from Tottenham, Hornsey, Edmonton and surrounding fire stations are attending.
The cause of the fire is not known at this stage.