Fatal Hydrogen Sulfide Leak at Texas Oil Refinery Kills Two, Injures Dozens

A chemical leak at Pemex's Deer Park facility prompted emergency protocols and a temporary shelter-in-place order for nearby residents.

The leak occurred during maintenance work on a flange at the Pemex Deer Park refinery, releasing toxic hydrogen sulfide gas.
Two contract workers were killed and 35 people were treated for exposure, with 13 hospitalized.
Emergency services issued a shelter-in-place order for Deer Park and Pasadena, which was lifted after air monitoring showed no community risk.
The U.S. Chemical Safety Board has launched an investigation into the incident, focusing on safety practices and potential causes.
Pemex temporarily halted operations at two refinery units to mitigate the impact and is working to resume normal activities.