Officials at Grand Canyon National Park say one visitor died and at least fifteen others remain missing or unaccounted for, after a major flash flood raged through parts of the canyon over the weekend.

The flooding prompted evacuations, and damage to critical infrastructure is being assessed as lodging within the park was temporarily shut down on Sunday.

“Grand Canyon National Park will implement Stage 4 water restrictions on the South Rim beginning at noon on August 31 in response to the significant flash flooding that occurred along Bright Angel Canyon on August 29,” park officials said in a statement.

Significant damage was reported along the Transcanyon Waterline, a major source of water to facilities within the park. “The waterline is currently not operational, leaving the park with limited water reserves and requiring significant water conservation measures to ensure available supplies can be maintained,” officials said on Sunday.

The sudden flooding occurred near Bright Angel Creek beginning on Saturday, following an intense period of localized rainfall.

More than five dozen visitors were reportedly evacuated by helicopter from the inner canyon, according to the Associated Press. Arizona Department of Public Safety assisted with evacuations, and officials are still assessing damage to infrastructure as the search for several unaccounted visitors remains underway.

National Park Service officials confirmed that the body of a 46-year-old man was recovered Sunday night near Crystal Rapids, and as searches continue, officials have requested that the public please assist in providing any information about their possible whereabouts.

“The National Park Service is asking anyone who knows of hikers or backpackers who were in the inner canyon along the Bright Angel Creek corridor on August 29, as well as anyone who had a campground reservation in the affected corridor, to provide information to the National Park Service Investigative Services Branch (ISB),” National Park Service officials said in a statement released by Grand Canyon Office of Communications on Sunday.

“This includes individuals who may have been traveling along the North Kaibab Trail from the North Kaibab Trailhead to Phantom Ranch, staying at Bright Angel Campground, or traveling or staying in the area known as ‘the Box’ north of Phantom Ranch.”

Officials also said the floods had been severe enough to wash out several footbridges and even dislocate some large boulders in portions of the Colorado River, altering sections of the river channel, and potentially making some of them unsafe.

Stage 4 water restrictions will remain in effect on the park’s South Rim, and year-round residents have been asked to use water sparingly while repairs remain underway.

Beginning in 2023, efforts began to modernize the park’s water system, culminating in a $208 million rehabilitation project that would provide water for the roughly 1,600 residents of Grand Canyon Village and the millions of annual visitors who enjoy the park.

Damage assessments continue, and National Park Service officials have warned that additional summer storm activity could affect the region.

“Additional thunderstorms and heavy rainfall are possible today and Monday, which could result in additional flash flooding, debris flows, rockfall and changing trail and river conditions,” officials said.

Anyone with information about individuals who remain unaccounted for in Grand Canyon National Park has been asked to contact the National Park Service Investigative Services Branch Tip Line at 888-653-0009.

Micah Hanks is the Editor-in-Chief and Co-Founder of The Debrief. A longtime reporter on science, defense, and technology with a focus on space and astronomy, he can be reached at micah@thedebrief.org. Follow him on X @MicahHanks, and at micahhanks.com.

New subsurface scans of Turkey’s controversial Durupınar Formation—a 157-meter (515-foot) geological feature long promoted by some researchers as the possible remains of Noah’s Ark—have reportedly identified subsurface anomalies that may challenge past assessments of the controversial site.

The findings, revealed in a press release and not yet detailed in research that has undergone peer-review, do not conclusively establish that the formation is artificial. However, according to researchers with Bakhtar Research and Engineering, LLC, and Noah’s Ark Scans, their preliminary data reveal newly identified features that warrant further investigation.

Durupınar Formation Scanned with Radar Developed for the U.S. Air Force

Scientists and religious scholars have long debated the historical basis of biblical narratives. However, the 1959 identification of the boat-shaped Durupınar Formation near Turkey’s Mount Ararat added a new dimension to the longstanding search for archaeological evidence associated with Noah’s Ark. Some researchers have argued that the formation’s dimensions and location resemble descriptions associated with the biblical vessel, while skeptics and geologists have generally maintained that the feature is a natural geological formation.

In a press release announcing the new analysis, the researchers said the survey marked the first use of BakhtarRadar at the controversial Durupınar site. The system was developed by project leader Dr. Khosrow Bakhtar, who, according to the release, has spent four decades developing detection technologies for organizations including the U.S. Air Force, Navy, Defense Threat Reduction Agency, and NORAD-USNORTHCOM. The team says the BakhtarRadar system used during the survey originated as a specialized subsurface imaging technology called EarthRadar, developed for the U.S. Air Force.

Joined by Noah’s Ark Scans founder Andrew Jones, Bakhtar conducted scans across the formation that the team says produced high-resolution, three-dimensional volumetric imagery of its subsurface features.

Before conducting the survey, the researchers outlined three primary objectives: determining whether the formation is a “single homogeneous mass of natural stone,” investigating whether it contains internal structures, and identifying the location of the underlying bedrock. The team also sought to determine whether that bedrock extends continuously beneath the surrounding valley.

“That is precisely the challenge at Durupınar,” the team’s statement explains, “separating layers, structures and discontinuities in difficult conditions and building a 3-D picture of what lies underneath.”

Not a Simple Homogeneous Mass of Rock?

Earlier investigations, including a 2019 ground-penetrating radar survey, reportedly identified several unusual subsurface features within the formation. These included voids, linear and angular features, and patterns that investigators interpreted as “possible corridors and chamber-like spaces.”

Unlike the equipment used in that earlier survey, the team said BakhtarRadar was deployed to “interrogate those same targets with a fundamentally different radar approach.” According to the researchers, the system also allowed them to examine the “deeper geological framework beneath the site” and attempt to trace the bedrock surface below and around the formation.

After completing scans across the Durupınar Formation, the team reported several preliminary observations from the data analyzed so far. Most notably, the researchers said the scans “do not show the formation as a simple, homogeneous mass of rock.”

Instead, Bakhtar and Jones reported what they described as “strong subsurface anomalies and layering” beneath the boat-shaped formation. They also said their analysis of the deeper data processed to date revealed “no clear boundary” beneath the formation. According to the team, this was unexpected because “the radar is looking well below where a shallow rock core would be expected to appear.”

The researchers also highlighted a subsurface anomaly extending approximately 250 feet through the central portion of the formation, which they have interpreted as resembling a “tunnel or hallway.” However, the feature has not been physically excavated or otherwise confirmed to represent an artificial structure.

The team cautioned that these observations were preliminary, and “remain subject to full processing and interpretation.” However, they also claim that their new findings “strike directly at the geological objection that has been raised against the site for years,” which argues that the Durupınar formation “is nothing more than a natural pile of rock or mud draped over shallow bedrock.”

“We are not trying to end this debate with a press release,” Jones said. “We believe this is Noah’s Ark, but the way to demonstrate that is to keep testing it.”

Even Some Creationists Remain Skeptical

For now, though, all the team has presented is the press release Jones mentions—none of the findings have been detailed in a formal study or undergone peer review. Additionally, critics have previously raised questions about how some of the team’s geophysical findings have been interpreted, particularly given that some members of the project, like Jones, have already publicly expressed their belief that the formation represents Noah’s Ark, and that others include self-ascribed Christian activists, according to the team’s website.

Even some prominent young-Earth creationists have expressed doubts about the team and its findings in the past. Such critics include Ken Ham, the founder, CEO, and former president of the Christian apologetics organization Answers in Genesis, who took issue with Noah’s Ark Scans’ founder, Andrew Jones, in a blog post last June.

“By his own admission, Andrew Jones of Noah’s Ark Scans, a committed leader of this latest ‘push’ to promote this site as the remains of Noah’s ark, was convinced of what this site likely was before viewing the results of these geophysical surveys,” Ham wrote on his blog last year, noting that geophysical data discussed by Jones had been “couched in terms of scan features being ‘decks’ as well as a claimed ‘corridor’ or ‘tunnel’ down the middle of the structure.”

“None of these reports objectively assess the raw geophysical data by canvassing other interpretations,” Ham argued.

It is worth noting that the Noah’s Ark Scans team concedes their failure to identify a bedrock boundary in the scan data processed so far, although noting that this “does not by itself prove bedrock is absent.” The group also concedes that radar anomalies alone “do not prove an archaeological origin.” Instead, they said more analysis and research will be needed to settle the argument about the controversial site’s true nature.

“Now we need to finish the processing, choose the best core locations, and put physical samples in the hands of the scientists,” Jones said in the recent press release. “That is where this becomes truly exciting.”

Preliminary Report ‘In the Coming Weeks’

The researchers said that the purpose of the ongoing effort is to find physical evidence that can “withstand scrutiny” and distinguish their interpretation of the site “from a purely natural geological explanation.”

The team says it expects to release a preliminary report “in the coming weeks,” after which its findings “will be integrated with the existing geophysical surveys” to help the team prioritize targeted core-drilling locations and “guide the next phase of the Durupınar investigation.”

Whether the group will produce evidence capable of persuading geologists and archaeologists—let alone critics of the project who themselves believe in the biblical flood—remains to be seen. Until physical evidence conclusively demonstrates otherwise, however, the Durupınar Formation is best described according to the prevailing geological interpretation: as a naturally formed geological feature rather than the remains of an archaeological structure.

Christopher Plain is a Science Fiction and Fantasy novelist and has spent the last six years as Associate News Editor and Head Science Writer at The Debrief. Follow and connect with him on X, learn about his books at plainfiction.com, or email him at christopher@thedebrief.org.