Bethlehem- Around 08:05 hrs the BFD was dispatched to 38 W. North St. for a dwelling fire. Incoming companies were aware of a possible working fire as they could see a header as they were responding. On arrival, they encountered heavy fire conditions on the upper floors. Strong cold winds played havoc with fire operations which then spread the fire to the adjoining residence at 40 W North St. A neighboring dwelling also experienced some exterior fire damage. The blaze went to three alarms and was under control in about three hours. All occupants were accounted for. One firefighter fell in a porch accident and another firefighter received minor burns. Both were treated at the hospital and released.