Torched car

In the photo ; Fire fighter, another man, the van on the side of the road, hose, and the hill in the background. The torched car was stripped of everything except the metal from the interior to the rubber wheels. The fire seemed to go up the hill and burned most of the small shrubs leaving black ashes mixed with sand. The people survived seeing how the car is empty no signs of casualties. How did this happen though? I took this picture to show how powerful fire can be even the Fire fighter had to stop and look at the intensity of this aftermath.