Power outages can last months and affected areas can be be "uninhabitable for weeks or months", the hurricane center says.
Graphic illustration and forecast of Tropical Storm Isaac as at September 9 2018.
Tropical Depression Nine became Tropical Storm Isaac on Saturday afternoon over the eastern tropical Atlantic, the National Hurricane Center said.
The Weather Channel said that "all interests along the U.S. East Coast from Florida to New England should monitor closely the forecast of Florence".
Risky swells generated by Florence were expected to batter Bermuda early in the week, as well as parts of the U.S. Eastern Seaboard.
"Pretend, assume, presume that a major hurricane is going to hit right smack dab in the middle of South Carolina and is going to go way inshore", South Carolina Gov. Henry McMaster said. As NPR's Bill Chappell reported, the town of Mountain View on the Big Island recorded 51.53 inches of rain as a result of Lane, the third-highest total ever measured from a US storm. In addition, strong, easterly winds could produce tidal flooding as well.
"Review your emergency plans and gather your supplies now", North Carolina Governor Roy Cooper said in a statement on Sunday.
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They are mothers and uncles and sisters and grandchildren, who know as well as we do that there is no substitute for equality. "Respect for individual choice is the essence of liberty", Dipak Misra , India's chief justice, told a packed courtroom.
Forecasters urged residents from SC to the mid-Atlantic to get ready - and not just for a direct blow against the coast. "Due to these conditions, Superintendent David Hallac is strongly urging all beach visitors to stay out of the Atlantic Ocean until risky conditions subside".
Florence regained Hurricane strength this morning, and is considered a potential threat as it is expected to pass within 460 miles of the island in the next 72 hours.
As a result, a Hurricane Watch and Tropical Storm Warning are in effect for the Cabo Verde islands of Santiago, Fogo and Brava. The storm is 1,540 miles east of the Windward Islands.
Chances of formation through the next 48 hours is high at 70 percent; chances grow to 90 percent through the next five days, according to N.H.C.
Check back throughout the week as well as on social media for storm updates.
Meteorologists are also tracking two tropical storms which formed off the coast of Africa.
However, the hurricane was soon downgraded to a tropical storm after its winds rapidly weakened down to 70mph. Then an nearly due west path is forecast through the rest of the weekend and through early next week.