Urgent Warning: Flash Floods Hit Northern Arizona Canyons

A flash flood warning has been issued for the Antelope Creek basin in Coconino County, Arizona, effective until 6:30 p.m. MST on Thursday, June 25. The National Weather Service in Flagstaff issued the alert at 3:36 p.m. MST, citing Doppler radar indications of thunderstorms producing heavy rain over the area. Residents and visitors are urgently advised to evacuate slot canyons, including Antelope Canyon, as life-threatening flash flooding is either occurring or expected shortly.

The warning highlights the extreme danger posed by flash floods in Arizona's desert landscape. These events, caused by heavy rainfall in a short period, can develop rapidly and be incredibly violent. Even minimal rainfall, as little as an inch per hour, can overwhelm desert soils that struggle to absorb water, leading to dangerous runoff, especially in steep canyons and dry washes. Areas affected by recent wildfires are at even higher risk due to altered soil absorption properties.