MONDAY 7/20/15 (97 DEGREES HOT) THE CAR WAS IN FRONT OF THE GARAGE. PUT GROCERIES INSIDE THE HOUSE, ON MY WAY BACK FOR MORE, I SAW WHITE SMOKE AND THE LIGHTS WERE FLICKERING AND SMELT LIKE BURNT RUBBER AND HORN WAS MAKING NOISE EVEN THOUGH I HAD THE CAR KEYS IN MY POCKET. NEXT, I SEE BLACK SMOKE COMING OUT OF THE DASH AREA AND I RAN INSIDE TO GET THE FIRE EXTINGUISHER FROM MY KITCHEN. I SPRAYED THE DASH AND IT LOOKED LIKED THE SMOKE HAD STOPPED. NEXT THING A HUGE BLAZE OF FIRE, SO I RAN TO MY HOSE AND SPRAYED WATER ON THE DASH. WINDSHIELD SHATTERED AND MY PASSENGER AIRBAG WENT OFF. FIREFIGHTERS AND POLICE CAME AND ASSISTED. NEVER THOUGHT SOMETHING LIKE THIS WAS POSSIBLE UNTIL I WENT ONLINE AND SAW HOW MANY PEOPLE'S PORSCHES HAS CAUGHT FIRE DUE TO A CIRCUITED FUSE.