At 2225hrs Chalfont firefighters responded to a fire alarm in the 50 block of Curley Mill Road in New Britain Township. Immediately after dispatch Bucks County 911 received a 911 call from the residence reporting smoke in the dwelling and requesting a response from the fire company. Tactical Box 34-2 was immediately dispatched. Battalion 34 (Schea) arrived on location and immediately reported a working attic fire. Engine 34-1 (Lt. Marino) responded and upon arriving on scene laid a supply line from the end of the driveway and went into service with multiple hand lines and a ground monitor. Chief 34 (McGuire) arrived and established Chalfont Command. Ladder 74 (Lt. Dando) arrived and went into service in the driveway with the ladder and ground monitors. Shortly after entry into the dwelling a partial collapse of the ceiling caused crews to retreat and Command called for an evacuation of the building. Chalfont Command called for a Tanker Task Force to assist in bringing water to the scene. Engine 34 and Tac 74 also responded. Crews were in-service for several hours and returned from the fire at 0500. Crews experienced difficulty at this incident due to the extremely low temperatures and freezing water including not being able to use a nearby dry hydrant. The New Britain Township and Bucks County Fire Marshal are investigating the cause of the fire. Assisting on this call were Chal-Brit EMS Hilltown Fire Company Doylesytown Fire Company Dublin Fire Company Plumsteadville Fire Company Colmar Fire Company Point Pleasant Fire Company Midway Fire Company Northampton Fire Company Montgomery Township Fire Silverdale Fire Company Dublin Fire Company and the North Penn Goodwill. New Britain Township Public Works also responded and assisted with spreading of salt due to the roadway freezing.