The deadly explosion at Clairton Coke Works near Pittsburgh occurred when a gas valve was flushed before planned maintenance, ...

The preliminary findings say how the company believes the explosion occurred. A union statement cautioned the investigation ...

U.S. Steel released preliminary findings about the potential cause of Monday's deadly explosion at U.S. Steel Clairton Coke ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

A front moves in and crosses the DMV Sunday into Monday, with a second front to push through the region Wednesday, with a cooldown expected later next week.

A Monongahela business launched a fundraiser to benefit employees of the U.S. Steel Clairton Works after Monday’s explosion ...

Test your knowledge of the week’s events as reported in The Wall Street Journal.