The Pipeline Fire in Flagstaff, Arizona, has burned at least 20,000 acres so far.
This dramatic on-the-ground footage shows a smoke tornado, formed by smoke from the fire, twisting in the air.
Local news reported that the blaze, which began on Sunday morning (12 June), was started by a man burning toilet paper at a campsite approximately 80 yards from where the fire began.
An estimated 600 firefighters were deployed to tackle the flames.
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