From Local News:
At 11:00 today, officials at Blaine High School noticed a very strong gas smell throughout the building. They called police, fire department and the gas company and evacuated the entire building. What they discovered was that during maintenance on the school's ice chiller, water was used to flush it out. That water connected with a dry substance and the drain created a very strong smell. The strong odor permeated through the sewer system throughout the building.
My guess it was the smell of AXE on all the Freshman guys mixing with the varied hair products of the Junior girls.