How to survive a flash flood

ST. GEORGE — One of Southern Utah’s unique weather patterns is the cycle of monsoon rains that affect the state from July to September.

Monsoon rains are characterized by sudden and intense rainfall, usually in the afternoon, and can cause flash flooding. This weather pattern is found in the desert southwest of the United States and northern Mexico. That means visitors to the state might find themselves caught off guard by an unpredictable storm.

Floods kill people almost every year in Utah. The geography of Southern Utah that brings in so many visitors is part of what makes them so deadly. The high canyon walls and washes that make up so many great hiking trails funnel the water into fast-moving flows. According to a National Park Service worker, a person in a slot canyon could look up and see blue skies when a storm is dumping rain miles up ahead, just out of sight.

The Utah Floodplain and Stormwater Management Association says just six inches of moving water is enough to knock a person off their feet, cause a car to lose control, or make the engine stall. One foot of water will float many vehicles, and two feet of water will wash away most vehicles.

If you are in a car during a flash flood, turn around, don’t drown. Do not attempt to drive through the floodwaters, because they are stronger than you might think. If water starts to rise around your vehicle, abandon the car and move to higher ground (if it’s safe).

The National Park Service offers these five tips if you’re hiking during monsoon season:
– Know the weather forecast for your area as well as areas upstream.
– Finish hiking in the morning and be out of canyons or away from washes before the afternoon.
– Do not camp overnight or park your vehicle along/ near streams and washes.
– Pay attention to water conditions. Leave the river area immediately if the water becomes muddy or begins rising!
– Stay out of flooded areas, as the water may still be rising and the current is swift.

Be aware that if you are hiking during monsoon season, flash flooding is always a possibility. To stay informed, check out local radar, television, or radio reports. The National Weather Service will issue regular flash flood warnings that can be heard on local radio stations. Updates can also be found on social media, for example the National Weather Service Twitter account.

By staying aware of weather conditions and having a plan, you can make your trip to Southern Utah a safe and enjoyable experience.

Sources:
– National Park Service
– National Weather Service
– ABC4 report on flooding in Utah
– UFSMA flooding pamphlet