Eight fire engines and around 60 firefighters were called to a basement fire on Station Road in Hayes on Monday evening (February 8th).
A small part of the basement, underneath a block of flats, was damaged by fire. There were no reports of any injuries.
Residents were alerted to the fire by the activation of their smoke alarms which prompted them to dial 999.
Station Commander Brett Loft, who was at the scene, said: “On arrival, crews faced heavy smoke in the lobby and communal stairwell and discovered the fire in an electrical substation in the basement below a block of flats. Firefighters worked swiftly to confine the fire to electrical intake equipment and stop it from spreading. Around 20 people left the building before the Brigade arrived. Firefighters ventilated the property due to smoke logging affecting several floors of the building.”
Fire engines from Hayes, Hillingdon, Heathrow, Southall and Feltham attended the scene.
Fire investigators believe the fire was caused by an electrical event inside the electrical intake equipment in the basement.