A sudden flash flood ripped through Grand Canyon National Park on Saturday, destroying footbridges and forcing dozens to evacuate by air. By Sunday evening, approximately 15 people remained unaccounted for, according to updated reporting from the National Park Service (NPS), down from an initial count of over 20.

The NPS confirmed flooding began around 2:30 p.m. Saturday in Bright Angel Canyon and Phantom Ranch areas, with evacuations continuing through Sunday as crews assessed damage to trails, bridges, utilities, and facilities. Nearly all footbridges across Bright Angel Creek were destroyed, while Phantom Ranch, Bright Angel Campground, the canteen, cabins, and the North Kaibab Trail remain closed until further notice. The Black and Silver bridges over the Colorado River are also shut with no reopening date announced.

Investigators are actively seeking information about individuals who traveled the North Kaibab Trail between its trailhead and Phantom Ranch, stayed at Bright Angel Campground, or visited “the Box” north of Phantom Ranch. The NPS requested details such as names, travel plans, approximate locations, group sizes, clothing descriptions, backpack details, and last known times in the area. Tips can be submitted anonymously through the NPS Investigative Services Branch at 888-653-0009.

The park reported no injuries in Sunday morning updates but emphasized the urgent need to locate all individuals affected by the flooding. Visitors with upcoming river trips were advised to contact their outfitters or the NPS River Permits office, while Xanterra notified guests with Phantom Ranch reservations about booking changes. Additional thunderstorms and heavy rain remain possible through Monday, increasing risks of further flooding, debris flows, and rockfall. The NPS urged people to avoid closed areas until conditions improve.