The dead include the seven -year -old mother and daughter were swept under rains in Kentucky.
At least nine people died after the hard winter weather hit the United States, including eight people in Kentucky due to heavy rains.
State governor Andy Beshear said on Sunday that hundreds of people blocked by floods should be saved.
Beshear said that many of the deaths, including those of a mother and a seven -year -old child, were caused by cars stuck in the high waters.
“So people, stay out of the roads right now and stay alive,” he said.
“This is the research and rescue phase, and I am very proud of all the Kentuckians who react, putting their lives at stake.”
Beshear said storms had eliminated power at around 39,000 houses, but he warned that hard winds in some regions could increase breakdowns.
Elsewhere, the northern plains were faced with a deadly cold and tornado watches were published for certain parts of Georgia and Florida.
In Kentucky, the Coroner of the county of Hart, Tony Roberts, said the mother and the child earned earlier on Saturday evening in the Bonnieville community.
In south-eastern Kentucky, a 73-year-old man was found dead in flood waters in Clay County, said Deputy Director of County Emergency Management, Revelle Berry.
Some parts of Kentucky and Tennessee received up to 6 inches (15 centimeters) of rain during weekend storms, said Bob Oravec, a senior Weather Service forecaster.
“The effects will continue for a while; Lots of swollen streams and a lot of floods are taking place, “said Oravec on Sunday.
In Atlanta, Georgia, a person was killed when an “extremely large tree” fell into a house early on Sunday, according to the captain of Atlanta Fire Rescue Scowll.
Meanwhile, strong snowfalls were expected in parts of New England and Northern New York.
Meteorologists said the United States was about to get its 10th and the coldest polar vortex event this season, with the North Rockies and the North Plains online.
Arctic weather forces combine to push cold air which generally remains near the North Pole in the United States and Europe.
