ON OCT 14TH AT NIGHT CAR WAS DRIVEN IN HEAVY RAIN OFF INTERSTATE I5 OFF RAMP TO EXIT INTERSTATE. THERE WERE CARS BOTH IN FRONT AND BEHIND US EXITING AND UPON DRIVING FURTHER NOTICED THERE WAS STANDING WATER. OTHER CARS WERE MAKING IT THROUGH SLOWLY, THERE WAS NO ROOM TO TURN AROUND. THIS CAR ALMOST MADE IT TO THE END OF THE OFFRAMP AND THEN STALLLED. OTHER CARS WERE FORCED TO GO AROUND. TRIED TO RESTART THE CAR TO NO AVAIL. CALLED FOR ROADSIDE ASSISTANCE. NOTICED SMOKE COMING FROM THE HOOD AND THEN ALL LIGHTING WENT DARK IN CAR. THEN SAW FLAMES FROM THE HOOD. QUICKLY RAN THROUGH WATER TO ESCAPE AND FLAMES GOT SEVERAL FEET HIGH. PASSER BY'S HAD CALLED 911 AS ENTIRE FRONT OF CAR WAS ENGULFED IN FLAMES. FIRE DEPARTMENT HAD TO CUT OPEN CAR HOOD TO PUT OUT FIRE. CAR DAMAGED BEYOND REPAIR AND THEY TOO WERE INCREDULOUS THAT A NEW CAR WOULD BE ENGULFED IN FLAMES AFTER STALLING IN THE RAIN.