Box 1-4 sent "A" platoon companies to 437 S. 14th Street for a house fire. Multiple calls were being received reporting a well involved structure to the rear of that address. Chief 7 (Horst) arrived with heavy fire to the rear of a 2 story, vacant, dwelling. Incoming companies were instructed to lead off with heavy water lines. The fire, located at 426 Daisy Street, was placed under control in about 30 minutes.