Floodwaters left cars completely submerged and many houses swamped
Floods set off by torrential rain are now known to have left at least eight people dead in the south-eastern US, including seven in Georgia.
Rescuers found the body of a 15-year-old boy early on Tuesday, several hours after he was swept away by floodwaters.
Georgia Governor Sonny Perdue has declared a state of emergency in 17 counties after nearly 600mm (2ft) of rain fell in the past two days.
Flooding has also affected Tennessee, Alabama, Kentucky and North Carolina.
Forecasters are warning of more heavy rain and possible flash floods.
Among the worst-hit areas was Douglas County in Georgia where four people died in separate incidents. A woman died in Gwinnett County when she was swept away.
In Carroll County, raging waters ripped apart a mobile home and swept away a two-year-old boy.
On Tuesday morning, the body of a teenager was recovered from the Chattooga River. He had been carried away by fast-moving water while trying to reach someone trapped in a vehicle, the Atlanta Journal-Constitution reported.
In Chattanooga, Tennessee, a man was presumed drowned in an overflowing creek, officials said, while an Alabama man drowned when a pond bank gave way, the Associated Press reported.
"This has been a 48-hour ordeal. We're no match for the kind of force water can put upon us," said Mr Perdue.
He urged people to give the waters time to recede and not to attempt to drive through them - many of those who died had been trapped in their cars.
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