Flash floods hit Utah, Arizona, New Mexico | USA TODAY

A hiker in Utah is missing after flash floods hit Zion National Park. Torrential rains have caused flooding across many Western states.

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Zion National Park is about 20 miles north of the Utah-Arizona border and is known for its narrow canyons and massive sandstone cliffs. Flash flooding has been a problem in the park.

From July to September, torrential rains can wash out trails, parking lots, structures and debris, causing damage and posing dangers to visitors with sometimes little warning.

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