Florida's Governor Rick Scott says Hurricane Michael left unimaginable destruction as it ploughed into coastal areas of the state.
The worst hit areas of Florida's northwest coast saw houses ripped from their foundations, trees felled, and power lines strewn across streets.
Hurricane Michael struck Wednesday with winds of 155 miles per hour.
It weakened to a storm as it moved inland towards the northeast, but at least six people have died, most of them in Florida.
More than 370,000 people in Florida were ordered to evacuate but officials believe many ignored the warning.
Governor Scott said the US Coast Guard carried out 10 missions overnight, saving at least 27 people.
With reduced winds of 50 miles per hour, Michael has moved north-east, crossing Georgia and is closing in on Greensboro, North Carolina.
The National Hurricane Center warned that communities in north-west Florida and North Carolina faced possible life-threatening flooding as rising water moved inland from the coast.