Crews continue to battle a blaze at the former Bethlehem Steel plant in Lackawanna
Emergency officals say it started around 7am Wednesday when a hot lightbulb fell onto cardboard in the building, roughly the size of six city blocks.
Television news footage shows a large building engulfed in flames with massive clouds of black smoke billowing into the sky.
The thick black smoke can be seen from miles away.
Crews inside had to be pulled out of the burning building as the fire began to spread and the building started to collapse
There have been no reports of serious injuries.