By Monday morning, the hurricane center classified Florence as a "major" hurricane, Category 3, meaning it was packing sustained winds of at least 111 miles per hour.
"We do not want to risk one SC life in this hurricane", Governor Henry McMaster said at a news conference.
The 2018 hurricane season has been quiet up to this point, but now there are two more systems developing behind Florence.
A tropical storm becomes a hurricane when maximum sustained winds reach 74 miles per hour.
While Florence is forecast to stay north of Florida, large swells will impact the east coast of our state resulting in life-threatening surf and rip currents. Multiple states have already declared a state of emergency in preparation for the damaging flooding that Florence is likely to bring. It is now entering a warmer zone that could lead it to gather strength, meteorologists said.
SC ordered an estimated one million people to evacuate its coast today as the state and neighbouring North Carolina brace for Hurricane Florence.
Hurricane Isaac - which late Sunday became the fifth hurricane of the season - is heading west towards the Caribbean.
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Navy ships off Virginia's coast are getting ready to sail out of the path of the powerful hurricane and one North Carolina university has cancelled classes. "Some units will not get underway due to maintenance status but will be taking extra precautions to avoid potential damage".
Florence was about 625 miles southeast of Bermuda as of 5 a.m. Monday. Hurricane Helene is expected to turn north into the middle of the Atlantic Ocean, according to the National Hurricane Center.
Oliva said various models have the storm's eye making landfall anywhere between Myrtle Beach, South Carolina, and Cape Hatteras in the Outer Banks.
A supervisor at the North Carolina emergency management office was welcoming workers back and telling them to prepare for a long week.
I'll have more on Florence later today.
The first mandatory evacuation order was issued at noon, and Cooper expects more later Monday and Tuesday.
"North Carolina is no stranger to hurricanes".
Olivia could weaken into a strong tropical storm within 48 hours, according to the Central Pacific Hurricane Center in Honolulu.