A catastrophic flash flood has struck Grand Canyon National Park, leaving over 20 people missing or unaccounted for following the intense rainfall on Saturday. The calamity unfolded as strong thunderstorms dumped more than an inch of rain in a mere hour, exacerbating the already vulnerable landscape atop recently burned areas.
The rapid rainfall triggered a surge of mud and debris through the Bright Angel Canyon, causing the floodwaters to rise perilously over 5 feet in just 10 minutes. This sudden deluge not only destroyed bridges across the Bright Angel Creek but also compelled the closure of one of the park's most challenging trails.
As of Sunday, the National Park Service reported that 62 campers and hikers were airlifted from the affected area. However, the scale of the disaster has raised concerns that over 20 individuals may still be at risk. The Grand Canyon National Park staff, in collaboration with the Arizona Department of Public Safety, are currently engaged in a relentless evacuation and response effort.
The National Park Service is appealing for any information regarding hikers or backpackers who may have been in the inner canyon along the Bright Angel Creek corridor on August 29. This includes individuals who may have been traveling along the North Kaibab Trail from the North Kaibab Trailhead to Phantom Ranch, staying at the Bright Angel Campground, or in the area known as 'the Box' north of Phantom Ranch.
The closure of Phantom Ranch, Bright Angel campground, the Phantom Ranch canteen, and cabins, along with the North Kaibab Trail, has been mandatory. The Colorado River was also closed to traffic after debris from the flood entered the waterway, while the Black Bridge and Silver Bridge crossings were shut down.
The Grand Canyon's infrastructure is already under stress from the Dragon Bravo Fire that ravaged the North Rim last year. The fire destroyed a historic lodge and altered the landscape, making it more susceptible to flash floods. The recent heavy rainfall has been a stark reminder of the vulnerability of the area.
The U.S. Geological Survey recorded an 8-foot rise in the Colorado River in just one hour, with Bright Angel Creek's waters spiking by over 5 feet before the sensor was damaged. The flash flood watch remains in effect through Monday, as forecasters warn of more dangerous downpours in Arizona and Utah.
Despite the dire situation, the Grand Canyon National Park Service warns that cell phone service throughout much of Northern Arizona is challenging to maintain. Satellite phones have shown some success in certain areas outside of the narrowest parts of the canyon.
The National Weather Service has issued a slight risk of excessive rainfall capable of triggering flash flooding across the Four Corners region, with a moderate risk in south-central Utah. Short-duration rain bursts, such as the thunderstorm downpours that caused the recent flash flood, are more likely to trigger debris flows than long-duration moderate rainfall.
As the Grand Canyon continues to reel from the impact of the flash flood, the search for missing individuals and the ongoing assessment of the damage to the park's infrastructure remain top priorities. The incident serves as a poignant reminder of the natural forces that shape this iconic landscape and the fragility of its ecosystem.
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