U.S. Steel says preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing ...

Allegheny County is boosting air monitoring after a deadly explosion at U.S. Steel’s Clairton Coke Works, a plant with a ...

The explosion happened when workers were flushing a gas valve in preparation for maintenance on two of the plant's coke oven ...

The Chemical Safety and Hazard Investigation Board’s probe into the deadly explosion at the Clairton Coke Works could take a ...

The deadly blast at the U.S. Steel facility outside Pittsburgh was just the latest in a series of recent workplace accidents.

Two workers were killed and nearly a dozen were injured while they were preparing for a maintenance project at the Clairton facility.

From tourist icons to local secrets, Philadelphia’s cheesesteak scene serves sizzling beef, melty cheese, and fierce hometown ...

Workers were heating coal and preparing for routine maintenance when an explosion rocked a U.S. Steel plant outside ...

The health department began deploying mobile air units Thursday provided by Pennsylvania’s Department of Environmental ...