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Are there flash floods in the Grand Canyon?

Yes. Flash floods are among the natural hazards of the Grand Canyon. The risk increases during the summer monsoon season, when thunderstorms can bring intense rainfall to the region despite its generally dry climate. Water from these storms can quickly collect in creeks and narrow canyons, producing fast-moving floods that may carry rocks, mud, and other debris. Such conditions can be especially dangerous for hikers and campers within the canyon.