Tacoma fire fighters responded early Monday morning to a house fire in the 5200 block of South Mason Avenue. According to Tacoma Fire spokesperson Joe Meinecke, fire fighters from seven companies arrived at the scene at 3:11 a.m. to find heavy flames and smoke pouring out of the single-story, 2,530-square-foot residence. Working smoke alarms alerted the homes three occupants to the fire and two of the occupants were evaluated by paramedics for injuries, but not transported. Paramedics also evaluated, but did not transport, one firefighter who sustained an injury battling the blaze, according to Meinecke. Fire investigators determined that the probable cause of the fire was an overloaded extension cord, resulting in an estimated $200,000 damage to the building and its contents.