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A decades-long megadrought, combined with low humidity and high winds, has created tinderbox conditions in the area.

The Southwest is experiencing the driest conditions in at least 1,200 years, a study published in Nature Climate Change in February found.

\"PHOTO:
Coconino National Forest via AP
PHOTO: In this photo provided by the Coconino National Forest, the Tunnel Fire burns near Flagstaff, Ariz., April 19, 2022.
>

Officials have declared a state of emergency in the area affected by the Tunnel Fire.

ABC News' Max Golembo and Marilyn Heck contributed to this report.

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