A large fire has been reported in at a metal recycling yard on Scrubs Lane, in Willesden North West London. 30 firefighters are tackling the blaze.
Thick black smoke can be seen across the city.
An eye-witnesses has reported four fire engines at the scene and has said that the fire is getting bigger.
London Fire Brigade have said that a large amount of waste metal is alight and have warned people living close to the fire to keep their doors and windows closed because of the smoke.