Primary / Secondary School, School / University Sprinkler system extinguishes fire in high school locker room (Las Vegas, NV) November 2, 2012 viking210 Firefighters found an activated automatic fire sprinkler in the boy’s locker room, but found no fire. It was determined that a towel caught fire in the locker room which activated the sprinkler system. The activation set off the alarm system which evacuated the school. There were no reported injuries.