The National Hurricane Centre’s latest forecast has warned Florence is expected to become a hurricane by Sunday.
The tropical storm is currently southeast of Bermuda.
By early next week, the storm will develop into a major hurricane.
At the moment, Florence is moving west across the Atlantic with wind speeds of around 65 mph.
The tropical storm will turn into a hurricane when winds reach speeds of at least 74 mph.
The centre of Florence is also expected to move over the warm waters of the southwestern Atlantic through Wednesday.
Why has North Carolina declared STATE OF EMERGENCY?
Swells created by Florence are currently affecting Bermuda.
Over the weekend, the US East Coast is likely to be hit by the swells too, which could cause life-threatening surf and rip current conditions.
In preparation of the upcoming swells, North Carolina Governor Roy Cooper has declared a state of emergency.
This means resources will be made available in order to cope with the storm’s destruction.
Mr Cooper also called on residents — particularly farmers — to prepare for heavy rain and dangerous surf.
He said in a statement: “While it’s still too early to know the storm’s path, we know we have to be prepared.
“During harvest, time is of the essence. Action today can avoid losses due to Florence.”
Mr Cooper has also signed a transportation waiver, which will mean farmers can harvest and transport their crops more quickly.
He added: “The executive order will help gather and move crops in and through the state more easily and quickly in response to problems that could be caused by Tropical Storm
Florence in North Carolina and along the East Coast.”