As of Saturday morning, at least six deaths have been blamed on the storm, nearly a million people were without power across North and SC, and some areas have already faced extreme flooding.
Since making landfall at Wrightsville Beach in North Carolina on Friday morning, Florence's forward speed has slowed down dramatically, with the storm's center of circulation only about 100 miles away from Wrightsville Beach a full 24 hours after landfall.
In the disaster area in North Carolina, where on 7 September declared a state of emergency, turned out to be about 500 thousand people.
At times, Florence was moving forward no faster than a human can walk, and it has remained such a wide storm that its counter-clockwise winds keep scooping up massive amounts of moisture from the sea.
Power outages affecting more than 900,000 in Carolinas.
"What we want to try to do is to minimize the time that people spend in their shelters that they're in right now", Sprayberry said.
In Swansboro, North Carolina, almost 34 inches of rain had fallen by Sunday afternoon and 20 other places in North Carolina had at least 20 inches, according to the National Weather Service. The previous record, 17.45 inches, was set during Tropical Storm Beryl in 1994.
In all, the weather service says the greatest amounts of rain from Florence are likely in the southwestern portions of the region.
At 8 a.m. Saturday, Florence stalled about 35 miles (55 kilometres) west of Myrtle Beach, moving forward at just 2 mph (4 kph), with top sustained winds of 50 mph (80 kph). The river runs through Fayetteville - home to the Army's Ft. "We don't need them going back into their areas until they're cleared safe to go".
Also of concern is the sprawling Norfolk Naval Shipyard in Virginia and Marine Corps bases at Camp Lejeune and Cherry Point in North Carolina and at Parris Island in SC.
Volunteers and city workers have been filling sandbags, trying to plug a low point in the city's levee system before the Lumber River crests.
"If you live in south Lumberton, west Lumberton, go ahead and leave now while you can, please", Cantey told CNN on Saturday morning.
As the storm center shifts further inland, counterclockwise rotation around the center of circulation will continue to pull in loads of tropical moisture from the Atlantic ocean and pushing up against the more rugged terrain of central and western North Carolina.
About 488,551 of those power outages are in North Carolina, and 16,385 are in SC.
At least five people, including a mother and her child, have been killed as Florence brings unending rain and storm surges to the region. The father was hospitalized with injuries. All but one of those deaths occurred in North Carolina. When they got to the home, the woman was dead, authorities said. SC recorded its first death from the storm, with officials saying a 61-year-old woman was killed when her auto hit a tree that fell across a highway. One was killed while connecting an electrical generator and another man was killed in a wind-related incident when checking on dogs outside his property.
In South Carolina's Union County, a 61-year-old woman was killed Friday night when the vehicle she was driving struck a downed tree, state emergency management spokesman Antonio Diggs said.