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Hiking canyons can quickly turn deadly when storms hit – what you should know before going in

After the deadly Grand Canyon flood, a geologist and avid hiker explains what nature lovers need to prepare and watch for to stay safe.

Canyons and narrow valleys offer breathtaking landscapes for outdoor enthusiasts, from hiking trails to climbing routes. As a geologist who has explored diverse terrains around the world, I appreciate the allure of these unique landscapes. However, these same features can turn a pleasant hike into a life-threatening situation when storms strike.

In Grand Canyon National Park, Arizona, monsoon rains and flash floods can quickly turn the most beautiful canyons into treacherous environments. On August 31, 2026, at least two hikers were killed, and a third went missing after powerful storms inundated a narrow canyon. Survivors recounted watching the water rapidly rise over the trail as they clung to a ledge, fearing their lives would be cut short.

Understanding the risks associated with flash floods in canyons is crucial for anyone planning to explore these environments. The steep gradients and narrow passageways of canyons act as natural channels, rapidly transporting large volumes of water downstream. Even in arid regions, heavy rainfall over a short period can create devastating floods due to the ground's inability to absorb the excess water.

To stay safe while hiking in canyons, it is essential to research and understand the specific risks of the area you plan to explore. Familiarize yourself with the potential escape routes and ensure you have the necessary equipment and knowledge to navigate through the canyon safely.

Written by urgent.news from The Conversation's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.

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