Apartment Building, Residential Early morning apartment fire put out by sprinkler system (Sioux Falls, SD) November 3, 2014 viking210 Sioux Falls Fire Rescue responded to a structure fire at this three-story business and apartment building in downtown Sioux Falls around 4:30 a.m. Sunday. Firefighters said the fire started in a kitchen on the third floor apartment, but the sprinkler system quickly kicked in and put out the fire, containing the small amount of damage to the one apartment kitchen. All of the tenants were able to safely exit the building.