What Are Zion Flash Floods
Zion flash floods are sudden, fast-rising floods that occur in and around Zion National Park and nearby desert canyons. They are usually triggered by intense rainfall upstream, even when skies are clear locally. Water can surge through narrow slot canyons and low-lying trails within minutes, turning dry washes into dangerous currents.
Why Flash Floods Are Dangerous in Zion
Flash floods are dangerous because they move quickly, carry debris, and can trap hikers and vehicles. In Zion, steep terrain and dry soil reduce absorption, increasing runoff. Floodwaters can block exits, damage roads, and strand visitors. According to the National Weather Service, even a few inches of water can knock a person off their feet or sweep away a car.
How to Prepare and Respond to Zion Flash Floods
Check forecasts from the National Weather Service before visiting Zion, and heed flash flood warnings and closures. Avoid hiking in slot canyons or low areas during or after storms. If a flood occurs, move immediately to high ground, stay away from water channels, and follow park instructions. For more details on flood safety and alerts, visit https://www.weather.gov/slc/flashflood.
