A massive industrial accident at a pulp and paper mill in Washington State turned deadly after a large chemical storage tank suddenly imploded, killing at least one person and leaving several others missing. The incident took place Tuesday morning at the Nippon Dynawave Packaging Company facility in Longview, a major industrial city known for its paper and timber operations. Emergency officials said the powerful implosion occurred around 7:15 a.m., triggering a large-scale rescue and hazardous materials response operation at the site.

Authorities confirmed that multiple workers suffered burn injuries and toxic inhalation exposure following the explosion, while emergency crews continued search and recovery efforts throughout the day. Firefighters, paramedics, and hazmat teams rushed to the mill after the tank rupture released “white liquor,” a highly corrosive industrial chemical used in paper manufacturing. Officials stated that the 80,000-gallon tank was nearly 60 percent full at the time of the implosion. Several injured victims were transported to hospitals in Longview and nearby Vancouver, while one responding firefighter was also reported injured during the operation.

The cause of the implosion remains under investigation, with officials saying it is too early to determine what triggered the disaster. The accident has deeply shaken the Longview community, where the mill employs nearly 1,000 workers and remains a major economic center. Families gathered outside the facility seeking updates about loved ones as emergency teams worked inside the damaged plant. Authorities also confirmed that the leaked chemical spilled into a drainage area, prompting environmental assessment teams to monitor possible contamination risks. U.S. Senator described the incident as an “absolute tragedy” and expressed condolences to the victims and their families.