Four fire engines and around 25 firefighters were called to a fire at a car park on Kings Road, Chelsea.
Approximately half of an electrical sub station in the basement car park was damaged by the fire. Around 20 people left the neighbouring properties as a precaution. There were no reports of any injuries.
The Brigade was called at 1517 and the fire was under control at 1836. Fire crews from Kensington, Soho, Battersea, and Chelsea fire stations attended the scene.
The cause of the fire was accidental due to a fault within the high voltage power supply.