Apartment Building, Residential Apartment fire contained by sprinkler system (St. Cloud, MN) October 17, 2012 viking210 St. Cloud Deputy Fire Chief Dean Wrobbel says a sprinkler system saved an apartment building from going up in flames early this morning. Wrobbel says when they got there, they found a mattress on fire in a second floor hallway. The sprinkler system had been activated, which kept the fire contained.