A Flash Flood Warning is in effect right now for Coconino, Apache, and Cochise counties in Arizona, issued jointly by the National Weather Service Flagstaff, AZ and National Weather Service Tucson, AZ. The warning became active on July 29, 2026, at 2:32 PM MST and remains in effect until 5:30 PM MST on July 29, 2026. If you are in or near these counties at any point during that window, this warning applies directly to you.
The National Weather Service headline for this event is direct: “Flash Flood Warning issued July 29 at 2:32PM MST until July 29 at 5:30PM MST by NWS Flagstaff AZ.” The language used in the official alert leaves no room for ambiguity. Deadly flash flooding is described as imminent or already occurring across the affected area.
What NWS Is Telling You to Do Right Now
The National Weather Service has issued an urgent, specific instruction for anyone currently in the region: get out of Antelope Canyon and other area slot canyons immediately. This is not a precautionary suggestion. The official alert language states that deadly flash flooding is imminent or occurring, meaning the threat is active as of the moment this warning was issued.
Slot canyons, including the widely visited Antelope Canyon in Coconino County, are among the most dangerous terrain features during flash flood events. These narrow, walled passages give water nowhere to go but through, and flood surges can arrive with little to no warning even when skies appear clear at ground level. Rain falling miles away on higher ground can funnel rapidly into canyon systems, producing a wall of water that outpaces any attempt to escape on foot.
If you are inside any slot canyon in Coconino, Apache, or Cochise county right now, move to higher ground immediately. Do not wait to observe rising water before acting. The NWS instruction to evacuate is based on conditions already in place, not a forecast of what might happen later.
If you are traveling toward any slot canyon in the affected counties, turn around. The warning covers the full period through 5:30 PM MST on July 29, 2026, and conditions can change faster than road or trail conditions are updated.
Connecting This Alert to Broader Preparedness
Flash flooding is one of the leading weather-related causes of death in the United States, and the Arizona monsoon season creates conditions where these events can materialize quickly across desert canyon terrain. At USRiskRadar.com, we track the full landscape of disaster risk across the country, including the sustained fire risk that has driven 15 of the 28 federal disaster declarations issued in the past 60 days, with Utah, Oregon, Colorado, and Nebraska among the most affected states. Flash flood events like this one in Arizona are a reminder that short-duration, high-intensity threats can occur alongside longer-term risks, often in the same region and the same season. Building a preparedness habit means staying aware of both: the slow-moving risks you can plan for over weeks, and the fast-moving alerts that require action within minutes. Bookmark official sources, keep location services active on your phone so that Wireless Emergency Alerts can reach you, and know the terrain before you enter it.
For the latest updates on this Flash Flood Warning, monitor the National Weather Service directly at weather.gov. Conditions during active monsoon events can shift quickly, and official guidance supersedes any information published here after the fact.
For the fundamentals that apply beyond this specific alert, see our Flood Preparedness guide.
Source: National Weather Service (NWS Flagstaff AZ, NWS Tucson AZ). Active alert data retrieved 2026-07-29 22:01 UTC via api.weather.gov.
