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. About 20,000 pigs were moved to other states, other parts of North Carolina or to the market, the Pork Council's Curliss said.
"I'm just assuming, based on the depth of the water that we had in North Carolina and the amount of rainfall, that we probably will exceed what we had in Matthew", Commissioner Steve Troxler said in an interview after flying over flooded areas.
Officials in North and SC warn that the flooding danger is far from over, with SC also ordering more evacuations as rivers rise.
There are more than 3,300 lagoons in North Carolina, said Andy Curliss, chief executive for the NC Pork Council. Eight more people died in SC and an additional person died in a storm-related tornado in Virginia.
But the aftermath of Florence's deluge is so vicious, rivers and waterways are rising fast across the Carolinas, burying communities and roads, and preventing evacuees from going back home.
The latest victims in SC were identified as Wendy Wenton, 45, and Nicolette Green, 43, by the Marion County Coroner, US media report.
Benetta White and David Lloyd slogged through waist-deep water filling their yard to escape Hurricane Florence's latest life-threatening punch to a town in the Carolinas.
To the south, daybreak brought a return of flood waters to Nichols, South Carolina, which also was inundated by Hurricane Matthew two years ago. Swollen rivers are gushing downstream toward flooded cities, putting more homes are at risk. What have we been doing for two years?.
The Governor's Office suggested an October 9 legislative session to give the administration time to work with state agencies, local communities and others to compile an appropriations request for the hurricane relief package.
"You can never tell what lies under that water", he said. McMaster asked Congressional leaders to hurry federal aid. The utility said it could not rule out the possibility that coal ash from a dump adjacent to the plant, which formerly burned coal, might be flowing into the nearby Cape Fear River.
Meanwhile, the National Hurricane Center said it was monitoring four areas in the Atlantic for signs of a new tropical weather threat. One was off the coast of the Carolinas with a chance of drifting toward land. Forecasters expect the Waccamaw to swell almost a metre above the previous record crest by early next week.
"Our people took a gut punch", Cooper said after the president's arrival. Some areas could stay underwater for weeks, forecasters warned.