Deadly Chemical Vat Implosion at Nippon Dynawave Packaging in Longview, Washington

At approximately 7:15 a.m. on Tuesday, a large chemical vat at the Nippon Dynawave Packaging plant in Longview, Washington, imploded. The vat contained “white liquor,” a corrosive mixture of sodium hydroxide and sodium sulfide used to break down wood for kraft paper production. The blast caused the vat to partially collapse, released smoke, and projected a metal pipe that sprayed liquid onto a nearby van. Local authorities confirmed multiple fatalities, several missing workers, and additional injured personnel with burns and inhalation injuries. Victims were transported to hospitals in Longview and Vancouver, Washington.

Toxic horror as multiple people killed, missing and critically injured in major chemical vat implosion at Washington paper millMultiple people injured in chemical vat implosion at facility in Washington state

Nippon Dynawave Packaging operates a kraft pulp and paper mill and liquid-packaging facility near the Columbia River, employing roughly 1,000 workers according to the Washington State Department of Ecology. The “white liquor” process is integral to producing kraft paper used in packaging, shopping bags, cups, plates, and cartons. The chemical’s high alkalinity makes it hazardous in the event of uncontrolled release.

Toxic horror as multiple people killed, missing and critically injured in major chemical vat implosion at Washington paper mill

The Longview Fire Department, aided by a regional hazardous-materials team, dispatched about 40 firefighters and paramedics. Responders decontaminated injured workers before transport and secured the site to prevent further exposure. The department posted on social media that fire crews and the HazMat team remained on scene working with plant employees to mitigate the product and container. The Cowlitz Fire and Rescue agency also participated, while Governor Bob Ferguson ordered the Washington National Guard to a heightened alert status and deployed state Department of Ecology personnel to assist.

Multiple people injured in chemical vat implosion at facility in Washington state

State officials expressed sorrow and pledged resources. Governor Ferguson said his administration was closely tracking developments and had deployed the National Guard and Ecology staff to support responders. The Longview Fire Department emphasized that there was no immediate threat to the public and urged residents to avoid the area. Cowlitz Fire and Rescue Chief Scott Goldstein indicated that information on the missing workers existed but would not be released pending investigation. The plant confirmed the incident but offered no details on the cause, which remains under review.

Multiple people injured in chemical vat implosion at facility in Washington state

Sources differ on casualty figures: one report cites “multiple” deaths and “several” missing, while another notes that the exact number of fatalities has not been released. The cause of the implosion is described as “unclear” in all accounts, and the extent of injuries beyond burns and inhalation damage has not been quantified. No public information is available regarding any prior safety violations or inspections of the vat.

Toxic horror as multiple people killed, missing and critically injured in major chemical vat implosion at Washington paper mill

• “'My team and I are tracking developments in Longview closely after a major chemical explosion,' he added.” — Governor Bob Ferguson

Toxic horror as multiple people killed, missing and critically injured in major chemical vat implosion at Washington paper mill

• “My thoughts are with the workers and their families, and with the first responders.” — Governor Bob Ferguson

Toxic horror as multiple people killed, missing and critically injured in major chemical vat implosion at Washington paper mill

• “Fire crews and a Hazardous Materials Team remain on scene working with Nippon Dynawave employees to mitigate the product and container involved,” — Longview Fire Department (social-media alert)

Multiple people injured in chemical vat implosion at facility in Washington state

The incident has triggered a state-level emergency response, heightened National Guard readiness, and an ongoing investigation by the Washington Department of Ecology and federal hazardous-materials authorities. Pending the investigation’s findings, regulators may review safety protocols for “white liquor” handling at pulp and paper facilities, potentially influencing industry standards nationwide.

Multiple people injured in chemical vat implosion at facility in Washington state