Footage recorded by Twitter user @TwelveInOregon shows employees heading to the back of the building to retrieve their cars, they wrote in a tweet.
Cornelius Fire Department and Oregon State Fire Marshal’s hazardous materials team reported to the scene as people were advised to avoid the area.
According to local news reports, ethanol fuel storage tanks exploded at Summit Natural Energy. The cause of the initial explosion is still unknown. Credit: @TwelveInOregon via Storyful