Wildfire threatens Grand Canyon's North Rim
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Fire crews expected to continue using aircraft to support ground crews on northern Arizona wildfires, according to InciWeb, a wildfire tracker.
Wildfires have forced evacuations at two U.S. national parks in the West as summer monsoon storms increase lightning in the region.
A lightning-caused wildfire known as the Dragon Bravo Fire is burning on the North Rim of Grand Canyon National Park. The fire is currently estimated at approximately 10 acres and is located south of the Basin near the W1 Road.
A water treatment facility at the North Rim had been compromised by the fire, causing chlorine gas to fall to the bottom of the Canyon.