Twenty fire engines and around 125 firefighters are responding to a fire on Hannah Close, Neasden.
Residents in the immediate area should close doors and windows, remaining inside where possible, due to the large amount of smoke being produced.
The fire is located at a mixed waste facility, and an industrial unit approximately 100m by 150m is currently alight. Three of the Brigade's 32m ladders have been mobilised to the scene as part of our response, alongside the Brigade's Drone Team.
Firefighters have also deployed a Hose Laying Unit and High Volume Pump to the scene. This will increase the amount of water available to firefighters as they work to bring the fire under control.
Tube services on the Metropolitan and Jubilee lines will be impacted as crews respond. Rail services into London Marylebone are also disrupted as a result of this fire.
The Brigade's Control Room took the first of over 70 calls reporting the fire at 1134. Crews from Wembley, Park Royal, Willesden and surrounding fire stations have been mobilised to the scene.
The cause of the fire is not yet known.