A significant flash flood event struck the Grand Canyon National Park on Saturday, August 29, starting around 2:30 p.m. in the Bright Angel Canyon and Phantom Ranch areas. This catastrophic weather event led to the recovery of one body, identified as a 46-year-old man, near Crystal Rapids along the Colorado River on Sunday evening. Approximately 15 individuals remain unaccounted for following the floods, which prompted immediate search and rescue operations including helicopter searches by the National Park Service and the Arizona Department of Public Safety.

The flooding caused severe damage to the park's infrastructure, most notably knocking out the Transcanyon Waterline. This vital pipeline supplies water to both visitors and the roughly 1,600 residents of Grand Canyon Village, impacting the nearly 6 million visitors the park receives annually. The damage to the waterline has resulted in limited water reserves, necessitating significant water conservation measures and the suspension of overnight hotel accommodations and dry camping across the park starting Monday. Lodging is still available just outside the park's South Rim entrance station in Tusayan.

Several popular areas within the park, including the North Kaibab Trail, Phantom Ranch, and Bright Angel Campground, have been closed indefinitely due to infrastructure damage, including destroyed footbridges and debris in the Colorado River. The National Weather Service reported that the flash floods resulted from one-quarter to three-quarters of an inch of rain in 30 minutes, falling on already saturated ground. The event is a major setback for an ongoing $208 million project, which began in 2023 and was expected to be completed next year, to modernize and upgrade the park's water delivery system.