Firefighters were called to a car alight in a supermarket car park on Balham Station Road in Balham.
One car was destroyed by the blaze and another two cars and a van were damaged. There were no reports of any injuries.
The Brigade’s 999 Control Officers took 22 calls to the fire.
The Brigade was called at 1225 and the fire was under control by 1249. One fire engine from Wimbledon Fire Station attended.
The cause of the fire has been recorded as undetermined.