Hurricane Michael has strengthened to a category two storm, with winds reaching in excess of 100mph (155km/h) as it barrels towards the Florida coast.
The storm is expected to reach category three strength before it makes landfall on Wednesday.
Forecasters say some regions may see 12in (30cm) of rain, and storm surges of up to 12ft (3.6m).
Governor Rick Scott warned residents to get out of the way, saying on Tuesday: “This is a monstrous storm”.
Source BBC News