Arizona flash flood in Grand Canyon leaves 20 missing and forces mass evacuation

A sudden flash flood swept through Arizona’s Grand Canyon on August 29, turning the normally tranquil Bright Angel Canyon and the Colorado River into a raging, debris‑filled torrent. Heavy rains upstream caused water levels to rise dramatically within minutes, overwhelming the narrow canyon walls and sending a wall of water and boulders downstream.

Park officials reported that at least twenty people are still unaccounted for after the flood struck. The missing are believed to have been in the vicinity of the Phantom Ranch and Bright Angel Campground, popular rest stops for hikers and river rafters. Emergency crews launched a coordinated search operation, deploying helicopters, ground teams, and sonar equipment to locate survivors in the fast‑moving water.

More than sixty visitors were evacuated from the affected sites. Staff at Phantom Ranch, the historic lodge perched along the river, helped move guests to higher ground, while the Bright Angel Campground was cleared as a precaution. Several sections of the park, including river access points and hiking trails, were temporarily closed to ensure public safety while cleanup and recovery efforts continue.

The National Park Service issued an appeal for volunteers and additional resources, emphasizing the need for rapid assistance in a terrain that is difficult to navigate. Local authorities also warned that downstream communities could experience secondary flooding as the swollen river reaches them.

The incident underscores the growing risk of extreme weather events in the Southwest, where climate‑driven storms can develop quickly and cause severe flash flooding in narrow canyons. Visitors to the Grand Canyon are urged to stay informed about weather alerts and to follow official guidance during high‑risk periods.