A four-alarm fire has burned the Columbia Spas business in Jefferson, about 10 miles south of Salem.
The Jefferson Fire District says firefighters were dispatched shortly after midnight and found the building engulfed in flames.
Flames and multiple explosions threatened a nearby mobile home park, so Marion County sheriff's deputies evacuated residents to a Red Cross shelter set up at Jefferson High School.
The fire was controlled about 2:30 a.m. Thursday. The cause remains under investigation.
The fire district says the 25,000 square foot building is insured and the owners were called to the scene.