Climate Lab

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These forces drove the deadly Grand Canyon flash flooding

People stand at the rim of the Grand Canyon with Bright Angel Canyon in the background, Monday, Aug. 31, 2026, in Grand Canyon National Park, Ariz. (AP Photo/John Locher) AZJL106 AZJL106

It's monsoon season in Arizona, but other factors also contributed to the dramatic and deadly flash flooding in the Grand Canyon.

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