Three fire engines responded to a fire involving two canal boats on the Grand Union Canal, near Carlyon Road, Alperton.
Two canal boats were destroyed by the fire and have sunk. A third boat was also damaged during the incident. There are no reports of any injuries.
The Brigade was first called about the fire at 0315, and crews from Wembley, Park Royal, Heston and surrounding fire stations attended the scene.
The cause of the fire is undetermined, due to the sinking of the vessels.