A chemical tank explosion at a packaging plant in Longview, Washington, has killed at least one person and left nine others missing, officials confirm. The blast occurred at Nippon Dynawave Packaging when a tank containing white liquor—a corrosive chemical used in paper production—ruptured, sending toxic fumes and debris across the facility. First responders report multiple injuries, including chemical burns, with victims transported to local hospitals for treatment.
The incident triggered a large-scale emergency response, though authorities have not yet disclosed the full extent of casualties or damage. Firefighters and hazardous materials teams remain on site, assessing the risk of further leaks or structural collapse. The cause of the tank failure is under investigation, with no immediate indication of foul play.
Nippon Dynawave Packaging, a major supplier of paper-based packaging materials, operates the Longview facility, which employs hundreds of workers. The company has not released a statement on the incident or its potential impact on operations. Local officials have not ordered evacuations beyond the immediate plant area, but residents are advised to avoid the vicinity due to lingering chemical hazards.
White liquor, a sodium hydroxide-based solution, is highly caustic and can cause severe respiratory and skin damage on contact. The U.S. Chemical Safety Board has been notified and may deploy investigators to determine whether safety protocols were followed. Similar incidents in the paper industry have previously been linked to equipment failure or inadequate maintenance.
This is the deadliest industrial accident in Washington state since a 2023 fertilizer plant explosion in Spokane that killed three workers. The Longview incident follows a string of chemical-related emergencies in the U.S. this year, including a chlorine gas leak in Texas and a fire at a plastics plant in Ohio.