UPDATE — Wednesday, October 21, 8:24 PM MDT: The National Weather Service has updated this warning — Doppler radar shows thunderstorms dumping between half an inch and an inch and a quarter of rain along the Santa Clara River, with flash flooding now expected through 9:45 PM MDT.

Santa Clara, UT — Life-threatening flash flooding is expected along the Santa Clara River, and the National Weather Service in Salt Lake City has a Flash Flood Warning in effect for south central Washington County through 9:45 PM Mountain time tonight.

What is happening: At 6:42 PM Mountain time, Doppler radar showed thunderstorms dumping heavy rain along the Santa Clara River. Between a half inch and an inch of rain has already fallen, and more storms are possible over the next couple of hours. Flash flooding is ongoing or about to begin.

Local impacts: Life-threatening flash flooding along the Santa Clara River, spreading into urban areas, highways, streets, and underpasses. Santa Clara and Ivins are expected to see flooding.

What to do:

- Turn around, don't drown — never drive through flooded roads. Most flood deaths happen in vehicles.

- If you see water rising around you, get to higher ground immediately.

Source: National Weather Service, Salt Lake City UT, October 21, 2026. Reported by TNW News.