A powerful flash flood ripped through Arizona’s Grand Canyon, sending torrents of muddy water, boulders and debris through Bright Angel Canyon and into the Colorado River. At least 20 people may be missing or unaccounted for, prompting the National Park Service (NPS) to appeal to the public for information.
The flooding occurred on August 29, with the NPS releasing details about the destruction and missing people on Sunday local time.
More than 60 people were evacuated from Phantom Ranch and Bright Angel Campground after floodwaters surged through the canyon. Several footbridges were destroyed, the creek bed was dramatically altered and large amounts of debris were swept downstream. Among the debris was what appeared to be part of a bunkhouse, while campers scrambled to reach safety.
The NPS has urged anyone with information about hikers and backpackers who were in the Bright Angel Creek corridor on August 29 to come forward. Officials are particularly seeking information about people who had reservations at campgrounds affected by the flooding.
Phantom Ranch, Bright Angel Campground and the North Kaibab Trail have been closed until further notice.
Flood damages Grand Canyon’s only water pipeline
The flooding also damaged the Grand Canyon’s only water pipeline, forcing the park to suspend overnight hotel stays from August 31 and ask residents and visitors to conserve water.
The pipeline is already undergoing rehabilitation as part of a $208 million infrastructure project. The latest damage could further complicate water management in the park.
The flash flood followed approximately 0.5 to 1 inch of rainfall within just 30 minutes. Because of the canyon’s steep terrain, much of the rainwater rapidly flowed downhill, creating powerful and destructive runoff.
Forecasters warned that additional rain and thunderstorms remained possible, raising the risk of further flooding in the area.
Authorities continued assessing the damage and working to determine the whereabouts of those reported missing as officials warned visitors to stay away from the affected areas.
