"We do expect this number to change," spokesperson Myron Hughes of the Unicoi County Emergency Management Agency said Sunday.

National Guard crews are working with local authorities and national disaster relief nonprofits in northeast Tennessee to coordinate basic services.

Thirty-three people remain missing in Unicoi County on Saturday after the Nolichucky River swelled and flooded swathes of the area, causing widespread damage.

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.