Hurricane Irma: Two-thirds of Florida without power

Relief operations are under way and

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engineers are working to restore power, but many areas remain stranded.

The islands of the Florida Keys and western parts of the US state bore the brunt of the category-four hurricane.

Irma hit Florida on Sunday and weakened to a tropical storm before becoming a tropical depression early on Tuesday.

The storm was downgraded as it moved north towards Atlanta, with maximum sustained winds of 56km/h (35mph) later recorded, the National Hurricane Center (NHC) said in a statement.