Flash Floods
All narrow canyons are potentially hazardous. Flashfloods, often from storms miles away, present a real danger and can be life-threatening. By entering a narrow canyon you are assuming a risk. During a flash flood the water level rises almost instantly--within seconds or minutes. The Narrows are susceptible to flash flooding because much of the surrounding land is bare rock that does not absorb water. During storms, runoff water is funneled rapidly into the Narrows.


Watch for these signs of possible flash flooding:
•Sudden changes in water clarity from clear to muddy (may be accompanied by floating debris)!

•Rising water levels or stronger currents

•Build-up of clouds or sound of thunder.

•Increasing roar of water up-canyon

 •Any deterioration in weather conditions

If you observe any of these signs, seek higher ground immediately. Do not try to beat a flash flood out of the canyon. Remain on high ground until conditions improve; water levels usually drop within 24 hours. If caught by flooding in an area with no high ground, try to take shelter behind a jutting fin of rock that can break the initial mass of water and debris. It may be possible to wedge yourself into a crack above water level. Even climbing a few feet may save your life.

In addition to the normal weather forecast, the National Weather Service also issues a flash flood potential rating for Southern Utah during the summer storm season. Although narrow canyons are inherently hazardous, you can make an informed decision by checking the most recent weather forecast and flash flood danger level report. These documents are posted daily at the park visitor centers and are available on the Web at:

Weather Forecast for Zion Canyon

Virgin River Stream Flow Rate

Flashflood Potential Rating


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