Flash flood risk rises in southern Utah: Hikers and campers urged to use caution during weekend plans

SALT LAKE CITY — The National Weather Service in Salt Lake City has issued a moderate threat for flash flooding across Southern Utah, warning that monsoonal moisture will fuel thunderstorms through the weekend. Campers, hikers and outdoor enthusiasts are urged to stay alert and reconsider travel into high-risk areas. “Monsoonal moisture is seeping into Utah today, and it will linger into the weekend,” said KSL Chief Meteorologist Kevin Eubank. “We will see scattered thunderstorms across the state on Friday, with the chance of localized flooding in central and southern Utah near burn scars, dry washes, and slot canyons.” In a post to X, the National Weather Service in Salt Lake city issued a "substantial" flood warning for La Verkin Creek in Zion's National Park.

A substantial flood wave is likely surging down La Verkin Creek. Please keep your children and pets away from the fast moving water! #utwxhttps://t.co/9OtdywlR48 — NWS Salt Lake City (@NWSSaltLakeCity) July 17, 2025

Watch the latest KSL TV Weather forecast here.

Search and rescue crews on high alert

The Washington County Sheriff's Office Search and Rescue team is prepared to respond as storms roll in. With approximately 100 members on standby. It's main concern this weekend centers on slot canyons and wash basins in and around Zion National Park. Sgt. Jacob Paul emphasized the unpredictability of flash floods in the region, especially in slot canyons that appear safe on the surface. “The storm could be dropping rain in Kane County — showing clear skies in Washington County — then suddenly water is traveling over 100 miles into slot canyons in the park catching people off guard,” he explained.

Know before you go: avoid narrow canyons and washes

Sgt. Paul urged would-be hikers to avoid slot canyons and wash basins if there's any chance of rainfall in the broader area. He stressed the importance of evaluating all upstream drainages — sometimes hundreds of miles away — that could impact narrow trails. If caught in a flooding situation, he advised:

• Seek higher ground immediately
• Move to wider sections of the canyon, where water can disperse and run at lower levels
• Continue to climb until you’re out of danger

“Get to the highest possible point you can,” Sgt. Paul said. “Whether you’re able to get out of the canyon or not, climbing may be the difference between safety and disaster.”

Tech that could save your life

Rescue crews say many hikers underestimate the power of smartphone navigation apps, which can help pinpoint your location — even offline. “You can download apps like onX that allow you to track yourself offline, figure out your location and retrace your steps if needed,” said Paul.

Hydration and heat: prepare in advance

Aside from flood dangers, Paul highlighted another critical concern: heat exposure. Many out-of-state visitors are not accustomed to southern Utah’s extreme temperatures, which can cause rapid dehydration. Tips to prepare:

• Begin hydrating several days in advance
• Pack ample water and electrolyte-rich fluids
• Avoid hiking during peak heat hours

“There’s no amount of water intake that can keep you hydrated during a hike if you haven’t prepped for it,” Paul said.

Staying safe helps protect rescuers too

It’s important to remember that many search and rescue team members are volunteers, putting themselves at risk to help others. Being prepared and making cautious decisions not only keeps you safe — it keeps them safe too. Contributing: Devin Oldroyd, KSL TV

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