A freight train operated by Ferromex, the logistics subsidiary of Grupo Mexico, derailed in the state of Sonora, spilling approximately 59,000 litres of sodium hydrosulfide, a highly toxic chemical.
The accident prompted immediate evacuations of nearby residents and triggered a specialized emergency response to contain the hazardous material.
The derailment marks the latest in a series of rail safety incidents in Mexico, compounding concerns over the operational integrity of the country’s freight network.
Authorities have declared a crisis zone in the affected area as containment operations continue.
Sodium hydrosulfide is a corrosive substance used in various industrial processes, and its release poses significant health and environmental risks if not managed swiftly.
This event follows two separate freight train derailments in Mexico on Saturday night, which also required emergency interventions and containment measures.