A Catastrophic Industrial A Catastrophic Industrial Disaster Shakes Longview, Washington
A devastating Washington chemical vat rupture has left 11 workers feared dead and eight others injured. A massive industrial tank imploded at a paper mill in Longview, Washington, on the morning of Tuesday, May 26, 2026. Governor Bob Ferguson described the event as potentially “the deadliest industrial tragedy in modern Washington state history.” As a result, the disaster has shaken the tight-knit community of Longview and triggered emergency responses at the local, state, and federal levels. OPB
What Happened at the Nippon Dynawave Packaging Plant?
The tank, containing a caustic solution known as white liquor, ruptured around 7:20 a.m. at the Nippon Dynawave Packaging plant along the Columbia River. Washington State Standard
The 900,000-gallon tank held hazardous chemicals at the Nippon Dynawave Packaging Co. facility in Longview. The implosion sent a torrent of corrosive liquid surging across the industrial site. Consequently, workers in the immediate area had no time to escape. CNN
Additionally, officials estimated that roughly 550,000 to 570,000 gallons left the tank, while some material remained inside and continued to slowly leak. MSN
What Is White Liquor?
White liquor is a chemical mixture of sodium hydroxide, sodium sulfide, and disodium carbonate that workers use in the paper-making process. ABC News
The mixture can cause second- and third-degree burns on skin contact. Inhaling concentrated vapor around the liquid can also be dangerous, though it primarily acts as an irritant when airborne. CNN
Therefore, the highly hazardous nature of this chemical made rescue efforts extremely difficult from the very beginning.
Death Toll Rises as Rescue Turns to Recovery
The search for nine missing people moved from a rescue to a recovery effort on Wednesday, bringing the likely total death toll to 11. Officials had previously confirmed two fatalities, and at least eight others suffered injuries. MSN
Moreover, seven workers at the facility suffered burns and smoke inhalation injuries, along with one firefighter. Medical teams transferred all victims to hospitals around Southwest Washington and Portland, Oregon. Wikipedia
Meanwhile, the community gathered in grief. Longview Mayor Erik Halvorson stated at a press briefing, “Our community has entered a period of profound tragedy and deep mourning.” ABC News
Recovery Efforts Face Dangerous Conditions
Rescue efforts officially shifted into recovery efforts, which crews halted Tuesday evening due to stability concerns. Officials confirmed the process would be “slow, methodical and deliberate.” CNN
However, the tank has since been deemed stable and concerns about it failing have been alleviated, allowing responders to proceed with planning to remove its contents. CNN
Furthermore, officials confirmed at a Wednesday press conference that roughly 25,000 gallons of white liquor remained in the tank as cleanup and recovery efforts got underway. KOIN.com
Washington Chemical Vat Rupture Contaminates Columbia River
Columbia River
The environmental impact of the Washington chemical vat rupture extends well beyond the plant’s boundaries.
Water samples taken overnight confirmed that chemicals leaked into the Columbia River when the 900,000-gallon tank of white liquor ruptured. Notably, the Columbia River serves as the lifeblood of the entire Pacific Northwest. KGM
Officials recorded a spike in high-pH material in the facility’s Columbia River discharge at roughly 7:15 a.m. Tuesday. Two to three hours later, two more spikes of high pH level traveled from the plant into the river. KGM
In addition, authorities directed the public to stay away from dikes and ditches between Washington Way and Prudential Boulevard due to contaminated water moving through the Nippon Dynawave storm drains. Governor Ferguson noted that about a dozen carp had already died in those waterways. KGM
Nevertheless, officials confirmed no effects on Longview’s air quality or drinking water supply. Wikipedia
About the Nippon Dynawave Packaging Facility
Nippon Dynawave Packaging Co. employs about 1,000 people at its pulp-and-paper mill and packaging plant. Indeed, the company ranks as one of the largest employers in the Longview-Kelso area. CNN
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. MSN
Importantly, the plant carried a troubled safety history before this disaster. A major blaze in July 2023 caused unhealthy air quality levels in Portland after large wood chip piles caught fire. Investigators never determined the exact cause. Another fire struck the Nippon property in 2025, though it caused no injuries. Wikipedia
Additionally, during previous inspections, officials cited the company because employees failed to wear face coverings when required. Inspectors also found that a worker faced fall risks on a platform without proper protection measures in place. NBC News
Governor and National Guard Respond
The scale of this disaster prompted a swift government response at the highest levels.
Specifically, Governor Ferguson deployed members of the Washington National Guard to assist with search-and-recovery operations and air-quality monitoring. Prism News
At a news conference, Governor Ferguson said, “I want to extend my deepest condolences to those who have been directly impacted by the loss of a loved one during this extraordinarily challenging time.” OPB
Similarly, Nippon Dynawave’s Brian Wood, support services director, broke his silence on Wednesday. Wood thanked first responders and the company’s workforce, saying, “These are our people. We are focused on our people.” OPB
Community Grieves as Families Wait for Answers
The disaster hit hardest for the families of missing workers. Longview resident Crystal Moldenhauer told reporters she has friends who work at the plant who remained unaccounted for. CNN
That same evening, community members held a candlelit vigil near the plant. Attendees placed electric candles at R.A. Long Memorial Park in Longview to honor those impacted by the tragedy. CNN
Furthermore, the Association of Washington Pulp and Paper Workers union stated that its immediate concern focuses on “affected workers, their families, emergency responders, and everyone impacted by this tragedy.” NBC News
What Caused the Washington Chemical Vat Rupture?
So far, investigators have not determined the cause. Around the same time as the tank rupture, a water main on the site also burst. Roughly 500,000 gallons of the chemical mixture combined with the water but stayed within the facility boundaries. ABC News
Cowlitz County fire official Scott Goldstein acknowledged that the cause remains unknown, adding: “We’re dealing with life safety concerns and incident stabilization at this point. That will come in the hours and days to come.” ABC News
As a result, federal and state investigators plan to launch a formal inquiry into the cause once crews fully stabilize the site.
Conclusion: A Community in Mourning
The Washington chemical vat rupture in Longview now stands as one of the most devastating industrial accidents in recent U.S. history. Eleven workers are feared dead, eight people remain in hospital care, and a major river system faces serious contamination. Recovery crews work carefully and methodically through a hazardous scene, while families wait in anguish for news about their loved ones.
As investigators begin piecing together the cause, urgent questions about industrial safety standards, environmental protection, and corporate accountability will inevitably follow. For now, however, the people of Longview focus on one priority — bringing their workers home.
This story is developing. Check back for updates as officials release more information.
