Damage estimates from a Beale Air Force Base fire on Monday exceed $10 million, authorities told the Marysville Appeal-Democrat on Tuesday.
The fire, which started in the civil engineering building, continued to smolder the day after it began.
Senior Airman Shawn Nickel indicated the structure is a total loss.
“The building is pretty much gone,” Nickel said.
Flames sparked around 2:30 p.m. Monday, causing major damage to the 38,000-square-foot building.
One firefighter, who has not been identified, was hospitalized with unspecified minor injuries. No other injuries were reported.
Officials said it was fortunate the fire sparked on a holiday — Martin Luther King Jr. Day — as only one person was working in the building. Usually, authorities said, about 200 people work inside the two-story building.