TVA's system of dams along the Tennessee River and its tributaries has been tested by record flooding from Hurricane Helene, which drenched Western North Carolina and East Tennessee as a tropical storm , washing out interstate lanes and trapping residents as small streams in the Great Smoky Mountains suddenly became raging rivers.

Big City Coffee’ Owner Sarah Fendley shares why her business was removed from the Boise State University campus on ‘Varney & Co.’ WATCH: Road bridge collapses into East Tennessee's Nolichucky River due to Helene floods The remnants of Hurricane Helene swept a bridge into a river in East Tennessee.