On Monday, the Cal Fire – Office of the State Fire Marshal, or OSFM, announced it had completed its investigation into the 2025 Oakdale Fire, which ignited near Esparto.

The report, produced with assistance from local, state, and federal agencies, includes evidence of illegal activities uncovered in the investigation, and has been provided to the Yolo County District Attorney’s Office to determine next steps.

The July 1, 2025, fire ignited following a series of explosions. Cal Fire’s Sonoma-Lake-Napa Unit resources assisted local firefighters quickly containing the fire at 78 acres. 

An OSFM Arson and Bomb Unit team was requested, promptly responded, and began gathering evidence to investigate the explosions that resulted in the deaths of seven individuals.

“After months of investigation, our Arson and Bomb investigators have compiled a report that reflects the Office of the State Fire Marshal’s commitment to uncovering what happened in Esparto,” said Chief Daniel Berlant, California State fire marshal. “This complex investigation took many turns as new information emerged, but the team diligently followed leads and gathered the facts that form the basis of the report.”

OSFM Arson and Bomb Unit investigators will continue to support the Yolo County District Attorney's Office with its criminal investigation as needed.