At least 12 women and children were killed and one is missing after a wall of water swept away two vehicles carrying women and children at a Utah-Arizona border community once called home by polygamous sect leader Warren Jeffs. About 20 miles away, four hikers died in the flooding.
A van and SUV carrying three women and 13 children sat near a widening stream on Monday, waiting for the water to recede so they could cross back to their homes in Hilldale, the small, polygamous town.
But in an instant, flood waters engulfed them and the two vehicles were sucked downstream, bobbing in the turbulent water before they tumbled over an embankment. Only three children survived.
Virginia Black watched in horror from her house as she made a video of the once-in-a-century flash flood. "There goes the van!" says Black in a high-pitched voice. "It went over the thing. Oh dear."
Downstream, people rushed to where the vehicles came to a stop. One witness described a gruesome scene of body parts, twisted metal and a young boy who somehow survived.
"The little boy was standing there," Yvonne Holm recalled. "He said, `Are you guys going to help me?'"
Some 20 miles to the north at Zion National Park, the same storm system sent flash floods coursing through a narrow slot canyon, killing four people and leaving three others missing. The group from California and Nevada in their 40s and 50s began their hike before officials closed the canyons that evening because of flood warnings, park spokeswoman Holly Baker said.
Flash floods are not uncommon in the area, but the volume and pace of Monday's rain was a "100-year event" in Hildale, said Brian McInerney, hydrologist with the National Weather Service in Salt Lake City.
The height of the storm lasted about 30 minutes, pouring 1 1/2 inches of rain into a desert-like landscape with little vegetation and steep slopes.
Monday's weather event was like a bucket of water being poured onto a rock - it slid right off and began running downstream, picking up sediment to create the forceful, muddy mess that rushed through the city, McInerney said. Another half-inch of rain came within the hour.
"It just hit the wrong place at the wrong time," he said.
Residents called it the worst flood in memory for the sister towns of Hildale, Utah, and Colorado City, Arizona, which is home base for Warren Jeff's polygamous sect. The majority of the 7,700 people in the two communities are followers of Jeffs' sect or have ties to polygamy.
The torrent was so fast, "it was taking concrete pillars and just throwing them down, just moving them like plastic," said Lorin Holm, who called the storm the heaviest in the 58 years he's lived in the community.
CoyLin Pipkin, 60, and her husband John Barlow could only watch from their cars as the white van carrying women and children swirled around in the fast moving water and careened over the edge into a ravine.
"It is devastating," Pipkin said Tuesday from her home.
Before they were swept away, she said she saw the three mothers standing outside their cars, watching the flood waters as many people in the community do when it rains. In this case, though, they had no idea of the water bearing down on them.
The women were returning from a visit to a nearby park, and it wasn't clear if they were aware of the National Weather Service warnings: "Move to higher ground now. Act quickly to protect your life."
"It was terrifying," said Black. "They were getting washed away, and there was nothing I could do about it."
Searches are expected to resume Wednesday in both Hildale, for the final unaccounted for person, and in Zion for the missing three hikers.
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