Maine lumber – Investigators said the May 15 fire and explosion at Robbins Lumber in Searsmont, Maine was accidental and began at the base of a silo, where a rapid ignition of particulate material triggered an explosion that lifted the silo from its concrete foundation.
On May 15. flames and a sudden blast ripped through the Robbins Lumber facility in Searsmont. Maine. turning a rural day into a rescue scene that kept growing. When investigators later returned to the core of what happened. they found something both specific and grim: the fire was accidental. and it began at the base of a silo.
The explosion and fire killed Andrew Cross, 27, of the Morrill Volunteer Fire Department. Cross was the only firefighter named in authorities’ accounts of the tragedy. The incident also injured a dozen other people. including members of the family that runs Robbins Lumber and other emergency responders.
Investigators said the May 15 fire and explosion originated at the base of the silo and spread from there. In a statement Tuesday. the Maine State Fire Marshal’s Office said rapid ignition of particulate material caused an explosion in the silo. lifting it from its concrete base and releasing large amounts of sawdust and other materials. After that, the silo toppled and the surrounding area became engulfed in fire.
Firefighters responded on a massive scale. The fire sent plumes of black smoke into the sky and required hundreds of firefighters from dozens of departments to suppress it. The scale of the response underscores how quickly an accident inside an industrial setting can turn into a regional emergency.
The fire marshal’s office said investigators will return to the facility in the coming months to conduct a more detailed examination.
One point of contention for people left to piece together what went wrong centered on whether a fire suppression system could have stopped the escalation. The statement said the facility’s fire suppression system. located near the top of the silo. did not activate because temperatures at that elevation did not reach the activation threshold after the fire originated at the base of the silo.
Maj. Aaron Turcotte. a spokesperson for the Maine Department of Public Safety. said last week that high winds during the investigation delayed the findings. In a statement. Turcotte said high winds throughout the day created difficult working conditions at the scene. leading to flying debris and periodic interruptions to investigative operations. He added that drone operations and aerial photography were particularly challenging because of the wind. causing delays in some scene documentation.
The blast was so significant it pulled state and federal investigators into the aftermath. The explosion in Searsmont. about 95 miles (150 kilometers) northeast of Portland. triggered a massive response from emergency responders to a rural part of the state. Investigators from the state fire marshal and the federal Bureau of Alcohol. Tobacco. Firearms and Explosives took up the investigation in the aftermath of the explosion and fire. which took hours to contain.
Gov. Janet Mills ordered flags in the state lowered to half-staff last week in honor of Cross. Mills said, “My heart goes out to the family, friends and colleagues of Andrew Cross,” adding, “He died a hero.”
Robbins Lumber describes itself as a “high-tech lumber manufacturer” that has been in existence since 1881 and family-owned for five generations. After the fire. family spokesperson Christian Halsted said it was a “hugely devastating day for the family” and that the family was cooperating with the investigation.
Beyond the immediate human cost, Maine’s lumber and wood products industry sits at the center of the state’s economy and identity. The Maine Forest Products Council said it contributed more than $8 billion to the state’s economy in 2024 and provides about 29,000 jobs.
For investigators. the next months will be about turning the preliminary chain of events into a fuller picture of how a fire that started at the silo’s base became an explosion and then a spreading blaze—one that left a firefighter dead and a community still searching for the clarity that comes only after the last piece of evidence is examined.
Maine Robbins Lumber Searsmont Andrew Cross Morrill Volunteer Fire Department silo fire sawdust explosion Maine State Fire Marshal ATF Janet Mills