Perry County Box 6-01 sent Engines 6,20, Rescue 6, Tanker 6, and Truck 2 to 20 S. Main Street in the borough of Marysville for a residential structure fire. Chief 6 advised of multiple calls, possible involving a second home. Chief 6 arrived with heavy fire showing and requested the working fire box. Engines 11,37, Rescues 2, 20, RIT 32, and Air 13 responded to the scene. Marysville Tanker 6 arrived first due, secured a hydrant, and 2 lines were stretched for the initial fire attack. Due to heavy fire conditions, companies were forced to evacuate the house, a 2.5 story, private dwelling that was unoccupied at the time of the fire. The bulk of the fire was knocked down in about 25