Desert Hiking - Flash Floods

Heavy rain can occur suddenly in the desert, especially during late summer when thunderstorms often form. Several inches of rain can easily fall in a small area within a few minutes. Because vegetation is sparse, runoff is rapid, and the water gathers force as it collects into the main drainages. The resulting flood often contains as much sand, gravel, rocks, and other debris as it does water, and may travel for miles from the place where the rain fell.

Never camp or park a vehicle in a dry wash or drainage.

You may never hear or see the storm that causes the wash to flash flood.

If you're in a drainage when water does start to flow or the existing flow starts to increase, immediately get to higher ground, abandoning equipment if you have to. The main flood can arrive with very little warning.

Never cross a flooded area, either on foot or by vehicle.

The water is usually muddy and turbulent, which makes it impossible to gauge its depth. Just ankle-deep water can sweep you off your feet and only a foot of water can sweep a vehicle downstream.

Flash floods are especially dangerous in narrow canyons where the high walls prevent an escape. Plan these hikes during periods of stable weather only.

Be aware of the seasonal and long-term weather patterns in your hiking area. If it's a local area, learn the weather patterns, and keep an eye on them before your trip. If you plan to hike in a distant area, check with the land managers for the degree of flash flood hazard.

Get the extended weather forecast from the National Weather Service just before leaving civilization.