The third-strongest storm in recorded history to hit the mainland US has battered north-west Florida, flooding beach towns and snapping trees.
Hurricane Michael made landfall on Wednesday afternoon as a category four storm with 155mph (250km/h) winds in the state's Panhandle region.
Two people, including a child, were killed by falling trees, officials say.
The storm left nearly 500,000 people without electricity in Florida, Alabama and Georgia, emergency services say.
Florida officials said a man was killed when he was crushed by a tree in Gadsden County.
A child died when a tree fell on a home in Seminole County, Georgia, CBS news reports.
Michael earlier reportedly killed at least 13 people as it passed through Central America: six in Honduras, four in Nicaragua and three in El Salvador.