Nine people were killed when floodwaters from a sudden rainstorm thundered through a tranquil swimming area in Tonto National Forest.
Crews continue to search Sunday afternoon for a person still unaccounted for, a day after the flash flood hit the Cold Springs canyon, located about 100 miles (160.93 kilometers) northeast of Phoenix.
The popular cooling spot, known as the Ellison Creek or Water Wheel swimming holes, is accessible through several hiking trails. It is about 20 feet wide and 20 feet long with a waterfall above it.
It isn’t the first time people have been killed when flash floods swept through so-called slot canyons, which are formed by the wear of water in rock and are typically significantly deeper than they are wide.
Here’s a look at other deadly flooding incidents in slot canyons in the U.S. during the past few years:
FLASH FLOOD AT ZION NATIONAL PARK
Seven people were killed in Utah’s Zion National Park in September 2015 when they were tapped during a sudden flash flood while hiking. The group was trapped by floodwaters in a popular slot canyon that was as narrow as a window in some spots and went several hundred feet deep.
A park ranger said at the time that the flooding went from a “trickle to a wall” of water. The group — comprised of hikers in their 40s and 50s — had set out on their trek hours before a flash-flood warning prompted park officials to close the canyons.
A Ventura County, California, sheriff’s sergeant, Steve Arthur, was among those killed.
COUPLE SWEPT AWAY IN FLASH FLOOD
A husband and wife from…
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