Millions of people across 15 U.S. states are under flood warnings after widespread rainfall overwhelmed rivers, streams and roads last week.

Flooding worsened across the U.S. South and Midwest, threatening communities already waterlogged and badly damaged by days of heavy rain and storms that killed at least 23 people.

Four years after flood waters swept through Humphreys County, killing 19 in the small town of Waverly, flash floods threaten the community once again.

COLUMBUS, Ohio — It was a wet weekend around central Ohio, and flooding has been a major issue. While the rain has let up for the time being, flooding concerns is expected to continue for rivers and streams in the coming days, as all the rain that fell continues to drain off and work its way downstream.

The historic Buffalo Trace Distillery has temporarily closed after deadly flooding ravaging Kentucky swept into its facilities, forcing the popular bourbon company to turn away the public and staff. In a statement released on Sunday,

On Sunday at 3:26 a.m. a flood warning was released by the National Weather Service in effect until 9:30 a.m. for Somerset County.

Jason Walker, from the Environment Agency, said: "The effects of flooding can be devastating and knowing what to do in a flood can significantly reduce the risk to life, property and possessions." Cheltenham Borough Council is also looking for more flood warden volunteers who will receive kit and training to help their community.

Rivers rose and flooding worsened Sunday across the U.S. South and Midwest, threatening communities already waterlogged and badly damaged by days of heavy rain and wind that killed at least 18 people. From Texas to Ohio, utilities scrambled to shut off power and gas, while cities closed roads and deployed sandbags to protect homes and businesses.

Since February, a growing wave of anxiety among older Americans over the future of Social Security has nearly doubled the number of calls to AARP.