Department Store, Retail Tucson, AZ – Fire at Big Lots store kept in check by sprinkler system February 23, 2015 viking210 The Tucson Fire Department credits a store’s sprinkler system with keeping a fire in check until crews arrived to put it out. The department says firefighters responding to a water flow alarm at a BigLots store on South Harrison Road early Thursday morning found smoke coming from the rear of the building. Firefighters found heavy smoke inside the store and a fire in the rear of the building, which was full of merchandise. Cause of the fire is under investigation and there’s no estimate on cost of fire damage.