Most of the outages are concentrated in North Carolina, where over 470,000 customers are still not receiving electricity.
In South Carolina, another 16,000 have no electricity, while in the state of Virginia, 14,000 are without power, said the portal, which tracks power outages across the United States.
Hurricane Florence made landfall on Friday and has dumped massive amounts of rain on several states, particularly North and South Carolina.
READ MORE: Florence Death Toll Rises to 16 as Heavy Rains Ravage the Carolinas
Local officials have said that at least 17 people have died as a result of Florence, which has been downgraded to a tropical depression, US media reported.