"As we look back at previous events, although hurricanes making landfall in the Carolinas are rare, the losses through this triple-threat of storm surge, wind and inland flood, could also be significant", RMS said in the report.
"Bad things can happen when you're talking about a storm this size", Trump said Wednesday morning.
Hurricane Florence put a corridor of more than 10 million people in the crosshairs Wednesday as the monster storm closed in on the Carolinas, uncertainty over its projected path spreading worry across a widening swath of the Southeast.
"The Charleston area now is expected to see at least 1-2 inches of rain over the next several days".
Experts predict that the storm could bring rainfall up to 40 inches and up to 13 feet of floodwater in some areas.
"This is not going to be a glancing blow", warned Jeff Byard, an administrator with the Federal Emergency Management Agency.
The Upstate could get 4 to 8 inches of rain if the latest forecast track for Hurricane Florence holds, according to the National Weather Service at Greenville-Spartanburg International Airport.
The slow movement, combined with the massive amount of moisture this storm holds, will bring risky rains - from 20 to 30 inches in coastal North Carolina and 40 inches possible in isolated areas, the weather service says.
USA insurers are bracing for what could be $20 billion in losses as Hurricane Florence barrels toward the Carolinas and Virginia, bringing punishing rains and potentially deadly flooding.
Salvo, NC to North Carolina/Virginia Border: 2-4′.
A hurricane warning was issued for South Santee River, SC, north to Duck, NC, and the Albemarle and Pamlico Sounds.
"This morning I drove around for an hour looking for gas in Cary".
In a videotaped message from the White House, US President Donald Trump said the government is fully prepared for Florence but urged people to "get out of its way".
Kevin Miller, a 50-year-old electrician, said he planned to ride out the storm at his home near Charleston.
"The big picture: There are several characteristics of the changing climate that are helping to increase the risks of damage from Hurricane Florence, even though global warming is not directly causing such a storm to spin up".
"Hugo was a direct hit", he said. "We have everything. We're ready".
Mass evacuations ahead of Hurricane Florence are still taking place while residents and tourists hope to evade what could be the strongest hurricane in decades to strike the East Coast. "Disaster is at the doorstep and it's coming in". "If you are on the coast, there is still time to get out safely". In South Carolina, close to the Georgia line, Beaufort County emergency chief Neil Baxley told residents they need to prepare again for the worst just in case.
We continue to keep our eyes on Hurricane Florence.
"It doesn't look like it's going to weaken at this point", Flaherty said.