Hurricane Michael is gaining strength as it makes its way towards the Florida coast.
The Category 3 storm is expected to make landfall by Wednesday afternoon, local time.
It is packing near 200 kilometer-per-hour winds and threatening dangerous storm surges and flash flooding.
Alabama, Florida and Georgia have declared states of emergency.
Hundreds of thousands of people face evacuate orders along the East Coast covering Panhandle and Big Bend.
President Trump declared a state of emergency for the entire state of Florida, freeing up federal assistance.
Officials have described the storm as "monstrous" and the most powerful hurricane to strike the mainland United States so far this year.