The latest victims in SC were identified as Wendy Wenton, 45, and Nicolette Green, 43, by the Marion County Coroner, US media report.
Lumberton homeowner Kenneth Campbell said he found at least 30 centimetres of water in his one-storey home when a friend took him into his flooded neighbourhood on a boat Tuesday.
Parts of the main north-south route on the East coast, Interstate 95, and the main road to Wilmington, Interstate 40, remain flooded and will likely be closed at least until almost the end of September, North Carolina Department of Transportation Secretary Jim Trogdon said.
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He said the town has no water, no sewage, no gasoline and they have been told that they won't have power for eight days. Blackhawk helicopters were used to pluck many of them to safety.
The governor said the cooperation with other federal agencies is the best it's ever been, adding "we are confident we will come out of this". Raised in barns, they can become trapped and drown in floods.
"We had to evacuate again, all over again, and got trapped in a bunch of water in a auto and nearly lost our lives", she said.
The death toll from Florence has reached an official count of 36.
North Carolina Gov. Roy Cooper says the state is still tallying its storm damage, but says it will be in the billions.
At least 43 people have died, included an elderly man whose body was found in a submerged pickup truck in SC, and hundreds were forced from their homes as rivers kept swelling higher.
"PLEASE DO NOT RETURN", the county said in a tweet.
McMaster said Friday he had "contacted or attempted to speak personally with the families of everyone who we lost during this crisis, this tragedy", including the families of Newton and Green.
The flooding from Florence has also caused 21 hog "lagoons", which store manure from pig farms, to overflow in North Carolina, possibly contaminating standing water, according to the state's Department of Environmental Quality.
"It's kind of a grassroots effort of people thinking, 'What can I do to help?'" UNC athletic director Bubba Cunningham told the outlet. "The road may be there, it may not be there".
Thousands of homes and roadways in the region remain underwater less than a week after the storm made landfall. Flooded CAFOs could release a potent mix of pollutants that can potentially harm human health and the environment. With the Waccamaw river forecast to slowly rise to a crest 4 feet (1.2 meters) above its previous record in those storms around Tuesday, Tovornik says he knows his house is doomed this time.
The company noted it has been excavating the plant's ash ponds since 2014, and has removed about 90 percent of it.
One major concern is the Cape Fear River near Fayetteville, which has quadrupled in depth, and it's only going to get worse. Duke reported a second concerning incident involving a coal ash landfill at the site in the aftermath of Florence.
Before Duke Energy established a natural gas plant in 2017, the area had a coal-fired power plant until 2013.
A young boy turned to prayer when he learned that even more flooding is headed to the Carolinas.
Cooper warned residents that the rain may have subsided, but the flooding danger is far from over. And they're my friends and they have gone through the tough stuff.