Washington Paper Mill Explosion Deaths: What Happened at Longview Nippon Dynawave

# Washington Paper Mill Explosion Deaths: What Happened at Longview Nippon Dynawave

> **Quick answer:** On May 26, 2026, a 900,000-gallon tank of white liquor — a caustic chemical mixture of sodium hydroxide and sodium sulfide — imploded at the Nippon Dynawave Packaging facility in Longview, Washington. At least 8 workers have been confirmed dead and 3 more remain missing and presumed dead, making this Washington state's deadliest workplace tragedy since 1930. The chemical reached the Columbia River and the US Chemical Safety and Hazard Investigation Board has opened a formal investigation.

The Washington paper mill chemical tank explosion deaths at Longview's Nippon Dynawave facility have shocked the Pacific Northwest and reignited a national conversation about industrial workplace safety. Eight families are waiting for answers. Three more workers are still unaccounted for. And a 96-year record for the state's worst workplace disaster has been broken — not just tied, but shattered.

*This article is for informational purposes only and does not replace professional medical advice. If you were exposed to white liquor or caustic chemicals, seek emergency care immediately. Consult a healthcare provider for any concerns about chemical exposure.*

## What Happened at the Longview Nippon Dynawave Plant

At approximately 7:15 AM PDT on Tuesday, May 26, 2026, a massive white liquor storage tank at the Nippon Dynawave Packaging Co. facility in Longview, Washington, imploded without warning.