The fire broke out around 9:43 p.m. Monday at SPS Technologies, located on the 300 block of Highland Avenue.
The view from Chopper 6 shows heavy flames consuming the property.
Officials said all occupants of the building were located, but as of midnight Tuesday, the fire was still not under control.
Residents within a half-mile radius of the warehouse are being asked to shelter in place.
SEPTA says the fire is also impacting service in the area.
