Around 1420 hours Box 35-5 sent companies to 2368 Forest Hills Drive for a residential structure fire. County Communications advised of multiple calls. Chief officer from Company 35 (Linglestown) arrived with a well involved 2 story, single family dwelling. Engine 37-1 (Rescue) postioned in the driveway and a port-a-pond was set up on side A. Companies went in service in defensive mode due to water supply issues and a partial collapse. Command 35 requested a second alarm tanker assignment. Engine 33 (Colonial Park) secured a hydrant down from the scene and Engine 34 (Paxtonia) relayed their supply line due to the long hose lay. Master Streams were used to knock down the bulk of the fire. Companies remained on the scene for several hours performing overhaul and applying foam to hot spots. The home was destroyed in the blaze.