The NWS says southern and central portions of North Carolina into far northeast SC are expected to report an additional 10 to 15 inches of rainfall - with storm totals between 30 and 40 inches along the coastal areas south of Cape Hatteras.
Tropical Storm Florence dumped "epic" amounts of rain on North and SC as it trudged inland on Saturday, knocking out power and causing at least eight deaths as flood waters that have devastated many communities kept rising.
In South Carolina, emergency managers were watching several northeastern rivers that flooded two years ago during Hurricane Matthew, destroying homes and government offices.
Florence peaked at a terrifying Category 4 with top winds of 140 mph over warm ocean water before making landfall as a Category 1 hurricane at 7:15am at Wrightsville Beach, a few miles east of Wilmington and not far from the SC line.
"This storm is still deadly and risky and it's expected to turn northward later today into Virginia and the mid-Atlantic", he said.
A man who was trapped inside his New Bern, North Carolina, home by Tropical Storm Florence spoke with Fox & Friends on Saturday.
Tropical Storm Florence is expected to weaken into a depression soon but flash flooding and major river flooding are expected to continue over significant portions of the Carolinas.
In nearby Onslow County, three US Coast Guard helicopters helped with rescue missions. However, as US Presidents Trump says, "fake news".
Numerous roads were closed, and authorities warned of the risk of landslides, tornadoes and flash floods, with dams and bridges in peril as rivers and creeks swelled.
There were 974,000 homes in the Carolinas without power on Saturday morning.
Trump, who spoke with state and local officials on Friday, plans a visit to the region next week.
The centre said the storm would dump as much as 40 inches (102 cm) of rain along coastal areas of the Carolinas, as well as up to 10 inches in southwestern Virginia.
In Wilmington, a city of about 120,000 people on North Carolina's Atlantic coastline along the Cape Fear River that is home to historic mansions and even a decommissioned World War II-era battleship, streets were strewn with downed tree limbs and carpeted with leaves and other debris.
"With a storm like this, you have communities that are faced not only with the devastation that a storm like this will leave behind, but the environmental injustices that may have already been existing in those communities", Glover said.
"The worst is yet to come", he added.
Sutton was mothballed in 2013 and the company has been excavating ash to remove to safer lined landfills.
Officials had warned before the storm rains could taint waterways with murky coal ash and toxic hog waste.
Footage released by NASA shows Hurricane Florence as seen from the International Space Station after it made landfall near Wrightsville beach in North Carolina on September 14th, leaving five people dead. The previous record of 24.06 inches was set during Hurricane Floyd in 1999.
In New Bern, at the confluence of the Neuse and Trent rivers in North Carolina, the storm surge overwhelmed the town of 30,000. Some area residents described a harrowing retreat as the storm hit.