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The death toll from Hurricane Ian rose to 54 and power remained out to more than 800,000 homes and businesses across Florida on Sunday, four days after the Category 4 beast slammed ashore along the state’s Gulf Coast.

Confirmed fatalities included 47 in Florida, four in North Carolina and three in Cuba, where Ian made its first landfall Tuesday. The count remained fluid Sunday.

Over 4,000 people have been rescued in Florida by local, state and federal authorities, FEMA and U.S. Coast Guard officials said. Most rode out the storm on barrier islands — and Sanibel and Pine islands remained essentially inaccessible Sunday.

Parts of the causeway to Sanibel collapsed, and the bridge to Pine, the largest barrier island off Florida’s Gulf Coast, was destroyed by the storm. Some residents were evacuated by helicopter. 

“The water just kept pounding the house and we watched boats, houses – we watched everything just go flying by,” resident Joe Conforti said. “When the water’s at your door, and it’s splashing on the door and you’re seeing how fast it’s moving, there’s no way you’re going to survive that.”

Florida Power & Light, the state’s largest power company, said it had restored electricity to more than 1.5 million customers, including all hospitals in its service area. More than 20,000 workers were involved in the restoration effort.

“Even given the unprecedented devastation caused by the storm, I can now confidently say that our restoration will be completed in a matter of days, not weeks,” company CEO Eric Silagy said.