Flash Flood Warning for Kane, Washington, Piute, and Garfield Counties Through 7 PM MDT August 31: What to Do If You Are on the Road or Near a Wash Ri

A Flash Flood Warning is in effect for Kane, Washington, Piute, and Garfield counties in Utah from 3:58 PM MDT through 7:00 PM MDT on August 31, 2026. The warning was issued by the National Weather Service Salt Lake City, Utah office and covers a stretch of southern Utah that includes canyon country, dry washes, and rural highways where flood conditions can escalate with little visible warning.

What NWS Is Telling You to Do Right Now

The National Weather Service is direct on the single most dangerous mistake people make during flash flood events: driving into flooded roads. The official guidance states, “Turn around, don’t drown when encountering flooded roads. Most flood deaths occur in vehicles.” If you are driving anywhere in Kane, Washington, Piute, or Garfield counties on August 31 and you encounter water across a road, do not attempt to cross it. The depth and current force of flood water on pavement are almost always greater than they appear from a vehicle.

Equally important, the warning applies well beyond wherever rain is currently falling. According to the NWS alert, flooding can affect locations that are receiving no rainfall at all. Dry washes, streams, and rivers can become, in the agency’s own words, “raging killer currents in a matter of minutes, even from distant rainfall.” If you are parked near or camping along a wash or creek bottom in any of these four counties, move to higher ground now. You do not need to see rain overhead for a wall of water to arrive.

The warning explicitly calls out campers and hikers: avoid streams or creeks for the duration of this alert. NWS states that “flooding is occurring or is imminent,” which means conditions are active, not merely possible. If you are hiking in a canyon corridor, a slot canyon, or along any riparian area in the affected counties on August 31, exit to open, elevated ground and stay there until after 7:00 PM MDT. Know your position relative to any drainage before you stop moving.

There is no guidance in this alert recommending shelter-in-place for people who are already on high ground and away from drainages. If you are in a solid structure elevated above flood-prone terrain, remain there and monitor conditions. The hazard is concentrated in low-lying areas, road crossings, and natural drainages.

Putting This Alert in Broader Context

Flash flood events like this one are a recurring feature of late-summer monsoon patterns across the desert Southwest, and southern Utah’s canyon geography makes the affected counties particularly vulnerable: water moves fast through narrow drainages and gives almost no lead time. For residents and visitors in flood-prone regions, the preparation that matters most happens before an alert is issued, not during it. Knowing which roads in your area are low-water crossings, identifying campsite terrain before you set up, and keeping a weather radio or reliable alert app active during monsoon season are the practical steps that close the gap between a warning and a safe outcome. The NWS Salt Lake City office issues alerts covering a wide and geographically varied region, and checking the agency’s site directly for your specific county during active weather events remains the most reliable way to stay current.

For the fundamentals that apply beyond this specific alert, see our Flood Preparedness guide.

Source: National Weather Service (NWS Salt Lake City UT). Active alert data retrieved 2026-08-31 22:00 UTC via api.weather.gov.