GRAND CANYON NATIONAL PARK, AZ — Grand Canyon National Park officials are searching for a Gilbert woman who was reported missing after a flash flood passed through Havasu Creek on Thursday.

Several hikers were trapped in a flash flood around 1:30 p.m., prompting rescue efforts near Beaver Falls later that afternoon.

Chenoa Nickerson, 33, was reportedly swept into Havasu Creek about a half-mile above the mouth of the Colorado River. National park officials say Nickerson was not wearing a life jacket at the time and has not been found.

She is 1.73 m tall, weighs 86 kg and has brown hair and blue eyes.

Anyone with information on her whereabouts is asked to call the tip line at 888-653-0009.

Nickerson’s sister Tamara Morales posted a photo of her in the canyon and said, “We remain hopeful that she will be found safely. Her husband Andrew was rescued and is safe. We love her very much and will not give up on her. We want all efforts to be focused on finding her and finding her safely.”

Tamara Morales

On Friday evening, Governor Katie Hobbs called in the Arizona National Guard to assist with rescue efforts in Havasupai, where flooding occurred.

Morales pointed to the efforts of the National Guard and praised National Park Service rescue teams for “navigating incredibly dangerous terrain with extremely limited communications and leaving no stone unturned.”

“We are deeply grateful to you and fully recognize that you are currently questioning the impossible,” Morales said on Facebook. She did not immediately respond to direct messages.

The Havasupai tribe’s reservation is one of the most remote in the Americas and is accessible only by foot, mule or helicopter. The tribal council closed the steep, winding trail leading to the reservation after the flooding and asked visitors with permits not to come until Sunday.

“We ask for your patience as we ensure the health and safety of tourists and tribal members,” the tribe’s tourism department said on its Facebook page.