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Two deaths and numerous injuries from chemical leaks in Texas and Louisiana

Two deaths and numerous injuries from chemical leaks in Texas and Louisiana

Refinery in Deer Park, Texas, in March 2012 [Photo by Roy Luck via Flickr / CC BY 2.0]

A hydrogen sulfide leak at an oil refinery in Houston, Texas, on October 10 killed two workers and injured dozens. The day before, an ammonia leak at a plastics plant in Baton Rouge, Louisiana, sent four workers to the emergency room with serious injuries.

Both facilities had been repeatedly cited for safety and environmental violations. There was a major fire at the Texas refinery in 2023 that raged for three days and resulted in nine hospitalizations.

Disaster in Deer Park

The oil refinery in Deer Park, Texas, a suburb of Houston, is owned by Petróleos Mexicanos (Pemex), the Mexican state-owned oil company. It was originally operated as a 50:50 joint venture with Shell until it was fully purchased by Pemex in 2021.

The cause of the chemical leak is under investigation and hazardous materials teams were unable to enter the facility for hours due to continued high levels of hazardous toxins.

Hydrogen sulfide, a colorless gas identified by its pungent “rotten egg” odor, is a highly toxic and flammable gas used in petroleum refining. 35 exposed workers were assessed at the scene by first responders and 13 were transported to area hospitals for treatment. When emergency responders were allowed to enter the facility, they found the bodies of two dead contractors, whose identities were not released.

The U.S. Occupational Safety and Health Administration (OSHA) notes that because hydrogen sulfide gas is more dense than air, it lingers and in high concentrations “can quickly cause death.”

Harris County Sheriff Ed Gonzalez suspected that a flange may have been opened, releasing the deadly gas. Refinery workers commented on social media that this “points to several critical flaws in the LOTO.” [lockout tagout] Procedure for this work area.” In August, an autoworker at the Tesla Gigafactory in Austin, Texas, was killed due to similarly lax enforcement of LOTO procedures.

It took two and a half hours for the city of Deer Park to issue a shelter-in-place order for its 34,000 residents because of the risk of exposure to the toxic pollutants. Industrial disasters are common in the Houston area, the oil refining epicenter of the Western Hemisphere, and cities like Deer Park have emergency warning systems, including sirens and text notifications.