JEFFERSON, OR (KPTV) -
Arson has been ruled out of a fire-alarm fire that ripped apart a business in Jefferson.
Fire investigators said Friday the fire at Columbia Spas was caused by a baseboard heater.
Firefighters were called to the scene of the massive fire shortly after midnight Thursday.
Flames had completely engulfed the 25,000-square-foot building by the time crews arrived at the scene, and neighbors reported hearing multiple explosions.
Firefighters said the fire threatened multiple buildings, including a nearby mobile home park. Deputies began evacuating people in the park at 12:43 a.m. and led them to a shelter at Jefferson High School.
Firefighters continue clearing the scene and intend to release the property back to the owners soon.
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