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Chemical tank rupture in Washington state causes multiple deaths and injuries - Finance news and analysis from Global Banking & Finance Review
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Chemical tank rupture in Washington state causes multiple deaths and injuries

Published by Global Banking & Finance Review

Posted on May 26, 2026

3 min read

· Last updated: May 27, 2026

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Chemical tank rupture in Washington state causes one death, multiple injuries

Incident Overview and Response

Details of the Chemical Tank Rupture

May 26 (Reuters) - A chemical tank imploded and ruptured at a Nippon Dynawave Packaging facility in the U.S. state of Washington on Tuesday, resulting in one death and nine injuries, while nine others remained unaccounted for as of Tuesday night, authorities said.

A joint written statement with Nippon and the Cowlitz County Sheriff's Department said a tank containing "white liquor," a chemical solution of sodium hydroxide and sodium sulfide used in making paper pulp, had ruptured around 7:15 a.m. local time (1415 GMT).

Volume and Contents of the Tank

While the tank was initially believed to hold around 80,000 gallons (302,830 litres), officials later said it contained closer to 900,000 gallons of white liquor, with an estimated 90,000 gallons of material still inside the damaged tank.

Emergency Response and Recovery Efforts

Recovery efforts would resume on Wednesday at the site in the city of Longview in Cowlitz County, about 45 miles (72 km) north of Portland, Oregon, as the tank remained unstable, Longview Fire Department Battalion Chief Matt Amos said during a media briefing.

Injuries and Medical Response

The injured, some critical, included eight employees of the facility as well as one firefighter, Amos said, adding that the firefighter had been treated and released.

Authorities had earlier said that multiple patients suffered from chemical burns.

Condition of the Injured

PeaceHealth St. John Medical Center in Longview told ABC News earlier in the day that six of the patients were in fair condition.

Community Impact and Official Statements

Officials reiterated in the evening that the implosion posed "no direct threat to the surrounding community."

At the media briefing, Washington state Governor Bob Ferguson said: "It's difficult always to find the words at a time like this ... Our thoughts and our prayers are with everybody impacted by this tragedy."

Background on Nippon Dynawave Packaging Facility

Nippon Paper Industries, Japan’s second-biggest paper manufacturer by sales, acquired the Longview plant from Seattle-based timber company Weyerhaeuser for $225 million and established the wholly-owned subsidiary Nippon Dynawave Packaging in 2016.

Japanese media reported that no injury was confirmed among Japanese employees, citing the Consulate-General of Japan in Seattle.

Related Industrial Incidents

In southern California, meanwhile, authorities have been monitoring an overheating industrial tank containing highly flammable methyl methacrylate. The worst-case possibility of an explosion was ruled out on Monday at the GKN Aerospace facility in Garden Grove after a crack relieved some of the mounting pressure, officials said.

(Reporting by Daphne Psaledakis in Washington, Ryan Patrick Jones in Toronto and Brad Brooks in Colorado, Additional reporting by Ananya Palyekar in Bengaluru; Editing by Caitlin Webber, Donna Bryson and Rosalba O'Brien)

Key Takeaways

  • A storage tank containing sodium hydroxide and sodium sulfide (“white liquor”) failed at ~7:15 a.m. local time, injuring at least 10 people—including a firefighter—and causing undisclosed fatalities (apnews.com).
  • The facility is a pulp and paper mill employing roughly 1,000 people and located along the Columbia River—specializing in liquid packaging board for products like cups, cartons, and tissue (apnews.com).
  • Hazmat teams and firefighters responded; victims with chemical burns and inhalation injuries were decontaminated and transported to hospitals in Longview and Vancouver; the incident remains under investigation with no immediate public threat (apnews.com).

References

Frequently Asked Questions

What happened at the Nippon Dynawave Packaging facility in Washington?
A chemical tank containing 'white liquor' imploded and ruptured, causing multiple deaths and critical injuries.
How many people were affected by the chemical tank rupture?
Authorities confirmed fatalities and critical injuries, with at least nine workers and one firefighter sent to hospitals.
Was there any threat to the surrounding community after the tank rupture?
Authorities stated there was no immediate threat to the surrounding community following the incident.
What chemicals were involved in the tank rupture?
The ruptured tank contained 'white liquor,' a solution of sodium hydroxide and sodium sulfide used in paper pulp production.
Were there any other related chemical incidents recently?
Authorities also monitored an overheating tank with methyl methacrylate at a California facility, but an explosion was ruled out.

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