Flooding at Yellowstone National Park sweeps away a bridge and washes out roads

High water in the Gardiner River along the North Entrance to Yellowstone National Park in Montana washed out part of a road on Monday. (National Park Service via AP)

HELENA, Mont. — Major flooding swept away at least one bridge, washed away roads and set off mudslides in Yellowstone National Park on Monday, prompting officials to close the entrances to the popular tourist attraction and evacuate visitors.

The flooding hit after recent "unprecedented rains," park officials said on Facebook.