Powerful 'smoke twister' spotted in Arizona

The twister formed from smoke from the Pipeline Fire in Flagstaff, Arizona, which has burned more than 20,000 acres so far.

Hundreds of homes have been evacuated as more than 600 firefighters battle the blaze.

According to local new outlets, the fire was allegedly started by a 57-year-old man who was burning toilet paper in the area. He says he was unaware of the local fire restrictions.