ENVIRONMENT

Longview mill tank rupture kills workers, prompts probe

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Longview mill tank rupture kills workers, prompts probe

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LONGVIEW, Washington – A catastrophic industrial accident at the Nippon Dynawave Packaging pulp and paper mill on May 26, 2026, occurred when a 3.4 million-liter chemical storage tank ruptured, releasing a massive volume of highly alkaline “white liquor,” a mixture of sodium hydroxide and sodium sulfide. The rupture happened during an early morning shift change, damaging vehicles, buildings, and critical equipment across the facility. Emergency response teams, including Cowlitz 2 Fire and Rescue, arrived to find a large-scale industrial scene with significant structural impacts and widespread contamination from the spilled chemical solution. By May 28, authorities confirmed at least two fatalities and shifted operations from rescue to recovery as nine additional people remained missing and feared dead. Ten other individuals sustained injuries ranging from minor to critical, prompting an extensive on-site medical and safety response. Specialist firefighters stabilized the facility and secured the remaining 95,000 liters in the damaged tank, limiting the immediate risk of further uncontrolled leakage. Washington Governor Bob Ferguson described the accident as potentially the deadliest industrial tragedy in the state’s modern history. Nippon Dynawave Packaging, a subsidiary of Japan’s Nippon Paper Group, faces an ongoing investigation into the cause of the tank failure.

Prepared by Olivia Bennett and reviewed by editorial team.

Timeline of Events

May 26, 2026 Tank ruptures during shift change
May 26, 2026 White liquor released from vessel
May 26, 2026 Emergency responders arrive, assess damage
May 27, 2026 Specialist firefighters stabilize chemical storage
May 28, 2026 Authorities confirm at least two fatalities
May 28, 2026 Search shifts from rescue to recovery
Late May 2026 Governor calls incident potentially deadliest
Late May 2026 Formal investigation into tank failure begins

Why This Matters to You

This incident is a stark reminder of the risks associated with industrial workplaces. If you or a loved one works in such an environment, it's vital to understand safety protocols. Check in with your employer about emergency procedures and equipment checks.

The Bottom Line

Industrial accidents like this can have devastating impacts on workers, families, and communities. As the investigation unfolds, we'll learn more about what caused this tragedy and how future incidents can be prevented. Share this with anyone you know who works in or lives near an industrial site.