Grand Canyon, White Sage wildfires
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A combination of high winds, dry air and above average temperatures caused a wildfire in the Grand Canyon to rapidly expand and cause major damage.
Officials in Arizona and Colorado have closed huge swaths of parkland to visitors after lightning-sparked blazes destroyed thousands of acres and hundreds of structures
Winds are expected to pick up through the week as the White Sage Fire and Dragon Bravo Fire burn in northern Arizona. Ian has the firefighting forecast.
Partial blue skies in the morning allowed many park visitors to ignore fires on the North Rim. By afternoon, ashfall made for a different story.