Chemical tank implosion at Washington mill kills 1, leaves 9 missing

At least one person killed, nine workers unaccounted for, eight employees and one firefighter injured with burns and inhalation injuries ranging from minor to critical.
We stand with you. We'll be here as long as it takes.
Governor Ferguson's statement to workers and families affected by the chemical tank disaster.

In the early hours of a Tuesday morning in Longview, Washington, an industrial tank holding nearly a million gallons of caustic chemical imploded at a pulp mill, killing at least one worker and leaving nine others unaccounted for. The disaster at Nippon Dynawave Packaging Co. is a reminder of how the invisible machinery of everyday life — the paper, the cups, the cartons — is sustained by human labor in proximity to forces that do not forgive error. As families waited and rescuers worked against an unstable structure still holding tens of thousands of gallons of dangerous chemical, the event joined the long human record of industrial catastrophe: sudden, indiscriminate, and slow to resolve.

  • A 900,000-gallon tank of white liquor — a caustic mix of sodium hydroxide and sodium sulfide — imploded without warning at 7:19 a.m., turning a routine shift into a mass casualty event.
  • Nine workers remain unaccounted for as of Tuesday evening, their families notified while search and recovery efforts are stalled by the tank's structural instability.
  • Eight employees and one firefighter were hospitalized with burns and inhalation injuries; four of the most critically injured were transferred to a specialized burn center in Portland.
  • Roughly 90,000 gallons of white liquor still sit inside the damaged tank, making every step of the rescue operation a calculated risk for the 40 firefighters and hazmat responders on scene.
  • Authorities hope to stabilize the tank and clear the remaining chemical by Wednesday, but officials have cautioned that the timeline is uncertain and the danger is not yet contained.

A chemical tank ruptured Tuesday morning at Nippon Dynawave Packaging Co. in Longview, Washington, killing at least one person and leaving nine workers missing. The tank held approximately 900,000 gallons of white liquor — a caustic industrial chemical made from sodium hydroxide and sodium sulfide used in paper processing. The implosion sent eight employees and one firefighter to local hospitals with injuries ranging from minor to critical.

Emergency crews arrived at 7:19 a.m. to find an active and ongoing hazard. About 40 firefighters, paramedics, and hazmat specialists responded to the facility. Nine patients were received at PeaceHealth St. John Medical Center in Longview, including one who was already deceased. Four were later transferred to the Legacy Oregon Burn Center in Portland for specialized treatment. Families of all nine missing workers were notified as search efforts began.

The scale of the chemical release proved larger than initially understood — early reports estimated 80,000 gallons, but authorities later revised that figure to nearly 900,000. As of Tuesday evening, roughly 90,000 gallons remained inside the structurally compromised tank, creating dangerous conditions for recovery personnel. Officials hoped to stabilize the tank and remove the remaining chemical by Wednesday, though the work was described as uncertain and hazardous.

Nippon Dynawave employs around 1,000 workers and produces materials for tissues, cups, cartons, and printing paper — goods that pass through daily life without a second thought. Governor Bob Ferguson appeared at a news conference to express the state's solidarity with those affected, pledging support for as long as needed. The cause of the implosion remained unknown as of Tuesday evening, with investigators focused first on life safety. As darkness fell, the fate of the nine missing workers remained unresolved.

A chemical tank ruptured at a pulp and paper mill in Longview, Washington on Tuesday morning, killing at least one person and leaving nine workers missing. The tank at Nippon Dynawave Packaging Co., which sits along the southern Washington border with Oregon, held approximately 900,000 gallons of white liquor—a caustic industrial chemical used in paper processing made from sodium hydroxide and sodium sulfide. The implosion sent eight employees and one firefighter to local hospitals with burns and inhalation injuries ranging from minor to critical severity.

Emergency responders arrived at 7:19 a.m. to find a scene of immediate danger. About 40 firefighters and paramedics, along with a regional hazmat team, descended on the facility. The families of all nine missing workers were notified as search and recovery efforts began. PeaceHealth St. John Medical Center in Longview received nine patients from the incident, including one who was already deceased. Four of those patients were later transferred to the Legacy Oregon Burn Center in Portland, where specialized burn treatment could be provided.

The scale of the chemical release created a complex and ongoing hazard. Initial reports suggested the tank held 80,000 gallons and was about 60% full, but authorities later corrected that figure dramatically upward to approximately 900,000 gallons. Roughly 90,000 gallons of white liquor were estimated to remain inside the damaged tank as of Tuesday evening. The tank's structural instability posed a serious threat to emergency personnel attempting recovery work, and officials warned there could be no quick resolution. Authorities hoped to stabilize the tank and remove the remaining chemical by Wednesday, but the work remained dangerous and uncertain.

Nippon Dynawave Packaging Co. operates one of the region's largest employers, with about 1,000 workers on its payroll. The facility produces material for tissues, printing paper, cups, plates, cartons, and other consumer goods—the kind of everyday products most people never think about. A disaster at such a facility ripples through an entire community of workers and their families.

Governor Bob Ferguson appeared at a news conference to address the crisis. "On behalf of the people in the state of Washington, I want all those individuals to know that we stand with you," he said. "We'll be here to do everything we can to help with the situation, and we'll be here as long as it takes." Authorities said there was no immediate threat to the public beyond the plant grounds, though the unstable tank continued to create hazardous conditions for the emergency personnel working to contain it.

The cause of the implosion remained unknown as of Tuesday evening. Cowlitz Fire and Rescue Chief Scott Goldstein said investigators were focused first on life safety and stabilizing the incident itself. The company did not immediately respond to requests for comment. What began as a routine Tuesday morning at an industrial facility had become a search and rescue operation with an uncertain outcome, the missing workers' fates still unknown as darkness fell.

We're dealing with life safety concerns and incident stabilization at this point.
— Cowlitz Fire and Rescue Chief Scott Goldstein
On behalf of the people in the state of Washington, I want all those individuals to know that we stand with you. We'll be here to do everything we can to help with the situation, and we'll be here as long as it takes.
— Governor Bob Ferguson
A Conversa do Hearth Outra perspectiva sobre a história
Inventor

Why does a tank holding that much chemical rupture all at once? Is this a common failure mode?

Model

The chief didn't say yet. They're still in the immediate crisis phase—stabilizing the scene, accounting for people, keeping it from getting worse. The cause investigation comes after you've stopped the bleeding.

Inventor

White liquor sounds almost benign. What does it actually do to a person?

Model

It's sodium hydroxide and sodium sulfide. Caustic. It burns skin on contact and damages lungs if you breathe the vapor. Some of the injured had both burns and inhalation injuries. The four they sent to the burn center in Portland—that tells you the severity.

Inventor

Nine people missing. Are they presumed dead?

Model

Authorities haven't said that. Missing means they haven't been found yet. In a tank implosion, the scene is chaotic, visibility is poor, and people may be trapped or displaced. The families have been notified, which is the hardest part of this kind of work.

Inventor

The tank was supposed to hold 80,000 gallons but actually held 900,000. How does that happen?

Model

That's a significant discrepancy. Either the tank was much larger than documented, or it was overfilled, or the initial report was just wrong in the fog of the emergency. Either way, it means more chemical, more danger, more to clean up.

Inventor

What happens next?

Model

They stabilize the tank so it doesn't collapse further or leak more. They remove the remaining 90,000 gallons carefully. They search for the missing workers. And then, eventually, they figure out why it failed.

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