Philadephia reported its largest fire since 2016 when a warehouse blaze in the Tioga neighborhood went to six alarms Sunday.
By comparison, the Philadelphia Energy Solutions refinery fire in June was only three alarms.
Fire Commissioner Adam Thiel said that the blaze spread through at least four buildings, requiring nearly 250 firefighters to bring it under control. Half of the on-duty firefighters in Philadelphia were brought to the scene.
At about 2 a.m, firefighters were dispatched to the warehouse on West Westmoreland Street. The warehouse was stocked with housing papers and other flammable materials that fed the fire.
A section of the structure collapsed before the fire could be brought under control. One firefighter was injured but is expected to fully recover.
Emergency personnel are expected to be at the fire scene for days to deal with any remaining hot spots.