THE VEHICLE WAS SITTING IN THE DRIVEWAY APPROXIMATELY 30 TO 45 MINUTES AFTER HAVING BEEN DRIVEN. I HAD NOTICED NOTHING UNUSUAL WHEN DRIVING THE CAR. I WALKED OUTSIDE TO THE DRIVEWAY AND FLAMES WERE VISIBLE INSIDE THE CAR. THE CAR WAS UNOCCUPIED AND WAS NOT RUNNING. THE SWITCH WAS TURNED OFF AND THE KEYS WERE REMOVED. THE DOORS WERE LOCKED. I UNLOCKED THE DOORS AND PUT THE FIRE OUT WITH A PAN OF WATER. I LET IT COOL OFF AND CRANKED IT AND MOVED IT OUT OF THE DRIVEWAY TO THE SIDE OF THE ROAD. I REMOVED THE BATTERY CABLE FOR SAFETY REASONS. THE EMERGENCY FLASHER SWITCH APPARENTLY HAD MELTED AND THE FLASHERS WOULD NOT TURN OFF.