As colder weather moves in, the systems we us to keep warm, like space heaters and furnaces, become a concern for firefighters. Already this season, firefighters have doused flames at various homes because of fires possibly sparked by heaters. Anything combustible should be kept at least three feet away from any heater and be sure children and pets stay away, too. All portable heaters should be turned off before bed, chimneys should be cleaned and smoke detectors tested. And with the upcoming holidays, turkey cookers, christmas lights and extension cords and other items also spark concern.