RAPID CITY, S.D. — Access to Mount Rushmore has closed and the Rapid City Fire Department is warning residents to “exercise extreme caution” around moving water as snow and rain continue to pound an already saturated Black Hills on Tuesday, May 21.

Areas in the southern and northern Black Hills are expected to receive as much as a foot of snow over the next two days, the Rapid City Journal reported. The entire region is under a flood watch and a winter storm warning, according to the National Weather Service.

The fire department reported Tuesday morning that Rapid Creek is flowing from 300 to 450 cubic feet per second through Rapid City, and that water is running over its banks all along the creek. In most areas, the creek is at least four feet deep and has trees, debris and other hazards coming through the fast-moving water.

The department is also urging motorists to not drive through flooded roadways.

Heavy snowfall in the southern Black Hills, meanwhile, has led to power outages and the closure of Mount Rushmore National Memorial, highways in the area and several businesses in Hill City and Keystone.