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

The Pennsylvania county where an explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than ...

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

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

A devoted dad has been identified as one of the two steel workers killed from an explosion at a Pennsylvania steel plant on ...

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

The Allegheny County Health Department announced that Mobile Air Units will be deployed in the Mon Valley as part of an ongoing investigation.

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