While officials say the blaze was intentionally set, the actual method of arson has not been determined.
The fire occurred Sunday at 1107 N. Howard Street at approximately 2:41 p.m.
The 3-alarm fire was placed under control at approximately 4:00 p.m.
Firefighters encountered heavy fire in the one story, abandoned warehouse.
The fire shut down Girard Avenue for several hours.
Fire Commissioner Lloyd Ayers tells all residents to install a smoke alarm on each level of their home and to plan and practice a home escape route. Persons who need a smoke alarm can call the Smoke Alarm Hotline: 215-686-1176.