Before evacuating their rental cabin on the edge of Yellowstone National Park, the Manning family watched a nearby house plunge from the riverbank into the raging, flood-swollen waters.
"The earth off the bank was coming off in sheets,” said Parker Manning, who had traveled from Terre Haute, Indiana, to Yellowstone with his family for a summer vacation.
"It was crazy when the house, when the building, finally hit the water,” Manning said. "It was floating down the river like a boat.”