Firefighters responded to a call about an overturned car on Ardsley Road, Worsbrough.
When crews arrived at the scene yesterday, at about 12.30am, they discovered the driver was already out of the vehicle.
Crews were also called to deal with a car found alight on Gainsborough Close, Flanderwell, Rotherham.
The vehicle had been set on fire deliberately.
n Anyone with information is asked to call police on 101.