Eight fire engines and around 60 firefighters tackled a warehouse fire on Field Way, Greenford.
Part of the ground floor was alight. There were no reports of any injuries.
The fire produced a large amount of smoke and local residents were advised to keep their doors and windows shut whilst we responded.
The Brigade was called at 0654 and the fire was under control by 0821. Crews from Northolt, Wembley, Southall and surrounding fire stations attended the scene.
The cause of the fire is under investigation.