Yellowstone visitors ordered to leave as floodwaters leave wreckage behind

National park entrances could be closed up to a week and some may not reopen all summer after record rains caused flooding

More than 10,000 visitors were ordered out of Yellowstone as unprecedented flooding tore through the nation's oldest national park, washing out road and bridges, officials said on Tuesday.

The only visitors left in the massive park that straddles three states were a dozen campers still making their way out of the backcountry.