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Explosion at U.S. Steel Coke Plant Kills Two and Injures Ten

Air quality remains within federal standards despite ongoing rescue efforts under an active investigation.

Image
Firefighters spray water on the site of an explosion at U.S. Steel's Clairton Coke Works plant in Clairton, Pennsylvania, U.S. August 11, 2025 in this screengrab obtained from an aerial video.  ABC Affiliate WTAE via REUTERS. NO RESALES. NO ARCHIVES. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. BEST QUALITY AVAILABLE.
La planta de U.S. Steel en Clairton, Pensilvania, el 2 de mayo del 2019. (AP foto/Gene J. Puskar)

Overview

  • Rescue teams continue working to free employees trapped beneath debris after the blast at Clairton Coke Works on Monday morning.
  • At least two workers were confirmed dead and around ten others were hospitalized following the explosion.
  • The blast damaged and disabled two coke battery ovens, reducing the plant’s production capacity.
  • Allegheny County Health Department initially ordered residents within a one-mile radius to shelter in place but lifted the advisory after air monitors showed no harmful emissions.
  • U.S. Steel is collaborating with local and federal authorities to determine the cause of the explosion following the facility’s history of environmental and safety incidents.