Hotel / Restaurant, Restaurant Fire sprinklers ensure safe end to fast food restaurant fire (Phoenix, AZ) May 29, 2012 viking210 A grease fire that errupted at a Taco Bell at 7:30 a.m. was quickly contained by the restaurant’s fire sprinklers, according to Fire Capt. Bob Costello. The fire crews put out the rest of the flames, and no employees were injured as a result of the fire.