earlier thunderstorm had dumped a large amount of water into the canyon basin, seven miles upstream. The lone survivor of the flood was tour guide Francisco "Poncho" Quintana, who had prior swift-water training. At the time, the ladder system consisted of amateur-built wood ladders that were swept away by the flash flood. Today, ladder systems have been bolted in place, and deployable cargo nets are installed at the top of the canyon. A NOAA Weather Radio from the National Weather Service and an alarm horn are stationed at the fee booth. On July 15, 2021, a Michigan woman died in a flash flood that swept through a slot canyon in Grand Canyon National Park. She was a customer with a commercial rafting group that camped overnight about a quarter of a mile from a slot canyon. Five other people with serious injuries were airlifted from the canyon as a result of the same flash flood. Gallery See also One-Line Sky References External links Southern Utah's Slot Canyons Slot Canyons of the American Southwest Video walk-through of a very tight slot canyon Landforms