Residential, Single Family Home Sprinklers prove effectiveness in single-family residence fire (San Luis Obispo, CA) September 4, 2012 viking210 Fire Department personnel responded to a structure fire at a single-family residence. Firefighters found a fire confined to the garage. A single residential sprinkler system activated and held the fire in check until firefighters arrived to completely extinguish the garage and check for hot spots. There were no injuries to fire personnel or the public.