CCTV footage shows debris floating in waves around a residential building in Florida on the day Hurricane Michael made landfall, and the same house and yard covered in mud on Thursday.

Experts at the National Hurricane Centre have said the hurricane's devastating storm surge reached as high as 14 feet (4.27 meters) in some areas of Florida's Gulf coast.

The centre's storm surge unit said on Thursday that peak storm surge ranged from 2.7 meters to 4.27 meters from Mexico Beach east through to Apalachee Bay.

Security camera footage from St George Island, which directly faces the Mexican Gulf and surrounds the Apalachee Bay, showed extreme water levels surrounding a house after the powerful hurricane made landfall on Wednesday.

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Video of the same building a day after Michael swept the area showed the garden completely covered in mud.