Allegheny County Executive Sara Innamorato joined ABC News Live with an update on the investigation of the explosion at a ...

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

Regulators are temporarily stepping up pollution monitoring in the Mon Valley after a deadly explosion at U.S. Steel’s ...

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

When horrific situations strike in the Pittsburgh area, such like the U.S. Steel Clairton coke plant explosion that killed ...

Authorities confirmed a second fatality after an explosion at the U.S. Steel Clairton Coke Works facility outside of ...

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

Authorities said their investigation has shifted to the cause of the explosion after they accounted for everyone who was missing.