Grand Canyon, Wildfire
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Authorities increased the size of the evacuation zone for the White Sage Fire north of the Grand Canyon on Friday morning.
The NPS recommends avoiding hiking the Grand Canyon's inner trails between 10 a.m. and 4 p.m., when temperatures are at their peak. Temperatures in the inner canyon can reach over 120 degrees Fahrenheit in the shade, creating "extremely hazardous conditions for hikers," the NPS said.