The element will lead to a "life-threatening storm surges, exceptionally strong heavy rains and destructive winds", they say.
To show the size and power of the storm, a number of photos taken Monday from the International Space Station and astronaut Ricky Arnold show Florence's girth as the storm churns across the Atlantic Ocean.
This incredible loop from #GOESEast shows Hurricane #Florence churning in the Atlantic.
President Donald Trump issues warning as Hurricane Florence advances
Hurricane Florence is bearing down on the East Coast, bringing 105 miles per hour winds and a risk of flooding. WILMINGTON - Hurricane Florence is now a Category 4 hurricane, according to the National Hurricane Center .
As more than a million Americans living on coastal areas prepare for evacuation to flee from the destructive path of Hurricane Florence, the astronauts on board the International Space Station (ISS) are keeping an eye on the Category 4 storm from their unique vantage point 250 miles (400 kilometers) above our planet. Packing heavy winds with a maximum sustained wind speed of 130 miles per hour (195 km/h), the hurricane is slowly barreling toward the U.S. East Coast, at a speed of approximately 13 miles per hour (20 km/h).
The US National Hurricane Centre has warned that Hurricane Florence will bring "life-threatening, catastrophic flash flooding" to North and SC.
"Further strengthening is anticipated, and Florence is expected to be an extremely risky major hurricane through Thursday", NHC officials warned in another advisory.
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However, she was soon forced to move to London for treatment, and was unable to return and formally take oath for the seat. Politicians from various political parties and high-level government officials also expressed deep grief over the death.
"Ever stared down the gaping eye of a Category 4 hurricane?"
Florence is predicted to make an overnight landfall Friday west of Wilmington, NC.
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Obama also reminded voters that the economic recovery - one of Trump's favorite talking points - began on his watch. Obama's appearance comes one day after a strongly worded critique of Trump at University of IL at Urbana-Champaign.
"I have just been informed that this is one of the worst hurricanes that came to the East coast for many years". The storm may not be spinning solo much longer, as three other disturbances are brewing in the Atlantic.