According to the U.S. Chemical Safety Board (CSB), more than 1,100 sprinkler heads at the facility were severely corroded when water leaked onto reactive chlorine‑based chemicals.

The explosion forced commanders to declare a major incident, mobilising more than 100 firefighters and prompting evacuations of nearby homes.

Fire crews were dispatched after reports of an explosion inside a single‑family home, where responders discovered large quantities of chemicals and hazardous materials stored throughout the property.

Polish fire‑service officials said the burning of plastics, packaging materials, and battery components created a complex chemical environment requiring extended containment operations.

Federal investigators from the ATF, OSHA, and the U.S. Chemical Safety and Hazard Investigation Board (CSB) have launched a joint inquiry into the explosion. The CSB, which investigates industrial accidents, has expressed concern.

Crews deployed high-capacity foam systems and elevated water streams to contain the fire within the affected unit, preventing it from spreading to adjacent processing areas. The refinery’s complex infrastructure spans over 1,100 miles of pipeline.

Sheriff Wallace issued a public safety warning following the explosion, emphasizing the extreme danger of smoking near oxygen tanks or hoses.