Even before Hurricane Michael made full landfall - which is the point where the eye of the storm hits land - it was knocking down trees with powerful winds and had caused flooding in the town of Apalachicola and Port St Joe, where more than 1.5 metres of water was reported.
Based on its internal barometric pressure, Michael was the third most powerful hurricane to hit the US mainland, behind the unnamed Labour Day storm of 1935 and Camille in 1969.
There were no immediate reports of casualties but officials were fearing the worst.
Gadsden County sheriff's spokeswoman Anglie Hightower said a "male subject" was killed by a tree toppling onto his house in Greensboro, Florida, in the first fatality related to the hurricane.
Based on its internal barometric pressure, Michael was the third most powerful hurricane to hit the USA mainland, behind the unnamed Labor Day storm of 1935 and Camille in 1969.
Scott spoke Wednesday morning with Trump, who signed a pre-landfall emergency declaration Tuesday ensuring that federal resources would be available before and after the storm in the 35 counties where the governor declared a state of emergency.
At least one person was killed in the storm. The debris was a problem in many coastal communities and still hundreds of thousands of people were also left without power.
A resident of St. Marks, Fla., rescues a cooler out of the floodwaters near his home on Wednesday.
Residents of Georgia and Alabama have been hit with power blackouts after the hurricane crossed into the southeastern part of the states. Emergency managers say they don't know how many left the area, but there were about 6000 people in 80 shelters in five states, including almost 1200 who are still in shelters following Hurricane Florence.
Meanwhile, Michael continues its track across southern Georgia toward the Carolinas. Some of those areas are still working to recover from Hurricane Florence.
National Hurricane Center Meteorologist Dennis Feltgen said: "We are in new territory".
Mark Wallheiser via Getty Images Flood waters hit the Cooter Stew Cafe in Saint Marks, Florida, on October 10, 2018, as Hurricane Michael pushes the storm surge up the Wakulla and Saint Marks rivers, which come together in the town.
A record-breaking landfall was made by Hurricane Michael, which plowed into the Florida Panhandle as a major Category 4 storm with 155 miles per hour maximum sustained winds. A National Ocean Service water level station at Apalachicola recently reported almost 5.5 feet of inundation above ground level.
As Michael exploded in power overnight, the expected inland effect of the storm became more expansive.
Only two other storms in recorded American weather history - that is, since 1851 - had stronger winds.
The Suwannee Valley is expected to experience sustained 40-50 miles per hour winds with gusts up to 75 miles per hour.
The latest minimum central pressure based on data from Air Force Reserve Hurricane Hunter aircraft has dropped to 928 millibars, meaning the eye of the storm remains intact and well-defined.
As the Tallahassee office of the National Weather Service said on Twitter earlier Wednesday: "If you're not sheltered in place now, you need to be!"