One hiker has been found dead and at least 14 others are missing after flash floods tore through the Grand Canyon in Arizona.Parts of the scenic canyon were hit by significant flash flooding on Saturday around 2.30pm, sweeping hikers and backpackers off the trails near the Colorado River.By Sunday evening, authorities said they were searching for 15 unaccounted people, after initially claiming that 20 hikers were missing. That had been a working estimate, park officials explained.But hours later, the National Park Service announced that the body of a 46-year-old man had been recovered near Crystal Rapids along the Colorado River.The victim's identity has not yet been released, while the Coconino County Medical Examiner's Office investigates.The other missing hikers are believed to have been trekking on routes near the Bright Angel Canyon and the Phantom Ranch area of the national park.Authorities are asking for the public to help identify people who were traveling near the North Kaibab Trail from the North Kaibab Trailhead to Phantom Ranch.This includes anyone that was staying at Bright Angel Campground, or traveling or staying in the area known as 'the Box' north of Phantom Ranch. The missing hikers are believed to have been trekking on routes near the Bright Angel Canyon and the Phantom Ranch area of the national park All footbridges spanning Bright Angel Creek were destroyed in the freak weather event, meaning that pedestrians cannot get across the creek, which has flooded Debris is seen being taken downstream during the flash floodingIt is unclear who the 14 missing people are, or where they are from.But 62 others were evacuated from the park yesterday amid the flooding. All footbridges spanning Bright Angel Creek were also destroyed in the freak weather event, meaning that pedestrians cannot get across the flooded creek.The National Park Service said in a statement: 'Grand Canyon National Park staff, in coordination with the Arizona Department of Public Safety, are continuing evacuation and response efforts and working to account for individuals who may have been in the affected area.' The flooding also knocked out the sole water pipeline that serves tourists and residents at the national park.Starting Monday, tourists won´t be able to stay overnight at lodges and hotels within Grand Canyon National Park. The park is also asking residents who live there year-round to conserve water.'These measures are crucial for ensuring the safety and sustainability of water resources,' the park said in a statement.About half an inch to an inch of rain fell within just half an hour in the rocky area where there's a steep drop in elevation, said National Weather Service meteorologist Justin Johndrow in Flagstaff.'Most of it ran off instantly,' Johndrow said.Horrific videos from the scene in the Grand Canyon showed mudslides tearing through the landscape, as hikers filmed from a suspended bridge above. Large mounds of debris were also seen floating on the brown water. The debris flow out of Bright Angel Creek - including sediment, trees, bridges and structures - had formed a dam that raised the effective height of the Colorado River by about eight feet