Flash flood rampaged through idyllic canyon of azure waterfalls; search for hiker ends in heartbreak

A 33-year-old hiker from Los Angeles was swept away by a flash flood near the Grand Canyon .

A husband and wife were swept away as they hiked near the point where Havasu Creek empties into the Colorado River .

"We were watching huge trees being ripped out with the roots, out of the ground," hiker Hanna St. Denis , 33 , says she had no way to call for help or even see around the canyon's next corner.

National Park Service was grappling with a daunting search for Chenoa Nickerson along the flood-swollen Colorado River .

Alerts went out via satellite to rafting groups to be on the lookout.

A group of river rafters spotted Nickerson 's lifeless body floating in the water.

Arizona Gov. Katie Hobbs deployed the Arizona National Guard to assist by scrambling a Blackhawk helicopter.

The Havasupai Tribe is applying for disaster aid with federal and state authorities.

The tribe has requested donations to its members, including drinking water, feed for horses and pets.

The village is home to a few hundred people, tribal offices, a U.S. Post Office , cafe, trading post and unpaved helicopter landing site.