Apartment Building, Residential Phoenix, AZ – Sprinkler system helps control fire in three-story apartment building April 20, 2015 viking210 An apartment fire in North Phoenix left six residents displaced on Saturday morning, according to Captain Aaron Ernsberger with the Phoenix Fire Department. The fire happened on the third floor of a three-story apartment building near Tatum Boulevard and Union Hills Drive. Crews from the Phoenix Fire Department quickly got the fire under control, and immediately began trying to stop the water flow to the sprinkler system from damaging the lower units. The Phoenix Fire Department is assisting the residents on all three floors that were displaced because of the water damage. The cause of the fire is unknown and is under investigation.