The Badger Fire near Sunset Point shut down northbound traffic on Interstate 17 Thursday afternoon for about two hours.
The right lane remains closed.
So far, it's burned 80-100 acres, according to the Bureau of Land Management.
Arizona Department of Transportation officials said the northbound backup is miles long.
BLM says the fire is wind-driven and has "high potential." Crews are working to put the fire out.
The closure ends south of Cordes Lake.
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