On August 11, 2025, a sequence of explosions ripped through the U.S. Steel Clairton Coke Works, located in Clairton, a suburb of Pittsburgh.
The incident claimed the lives of two workers and left at least ten others injured in what quickly became a major industrial disaster.
The first blast occurred at approximately 10:51 a.m. inside a coke battery area, specifically in the “reversing room” servicing batteries 13 and 14.
This was followed by several secondary explosions. Emergency crews—comprising around 20 EMS agencies and 14 fire departments—rushed to the scene to manage fires, conduct a rescue operation, and provide medical aid.
One worker was rescued alive from the rubble, while another was initially reported missing. Both individuals were later confirmed deceased after extensive search efforts.
Ten other workers were transported to hospitals—five were in critical but stable condition, and five were treated and released within hours.
Additional personnel received immediate care on site.
Residents living within a one-mile radius were advised to stay indoors and minimize air intake due to concerns over air quality.
Authorities monitored conditions and later lifted the advisory once no hazardous pollution levels were detected.
The plant, known as North America’s largest coking facility, remains operational despite the damage.
An official investigation led by the Allegheny County Fire Marshal and federal agencies is now underway to determine the cause.
Among those who perished was Timothy Quinn, a 39-year-old heater and father of three, who had worked at the plant for over 15 years. The second victim has not been identified publicly.