While driving steam started to appear from the engine bay. I pulled over to inspect, lifted up the hood and could hear the fuel line popping and gasoline hissing out. The engine bay spontaneously caught fire. As it ignited all of the gasoline in the air combusted and created a ball of fire in my face as I was looking in the engine bay. The fire was put out by the fire department. An incident report was created. The potential for safety risk was high and could have been worse if I was not on a road where I was able to stop or if it caught fire while I was inside the car. The vehicle has been inspected by Insurance and confirmed to be a total loss. Since nothing was left to visually inspect of the car their investigation came back nonconclusive as to the cause. There were no indication lights that there was anything wrong with the engine.