(Reuters) Hurricane Irma evacuees from the Florida Keys began returning to the storm-ravaged island chain yesterday to find homes ripped apart and businesses coated in seaweed amid a debris-strewn landscape where an estimated 25 percent of all dwellings were destroyed.A local resident reacts as she sees the damage on her home after Hurricane Irma struck Florida, in Islamorada Key, U.S., September 12, 2017. REUTERS photoThe death toll from Irma, previously ranked as one of the most powerful Atlantic storms on record and the second major hurricane to strike the U.S. mainland this season, climbed to 43 in the Caribbean, with at least 13 more killed in Florida, Georgia and South Carolina.Some of those died from accidents during cleanup and repair efforts.Destruction was widespread in the Keys, a resort archipelago stretching southwest from the tip of the Florida Peninsula into the Gulf of Mexico and connected by a single, narrow highway and a series of bridges and causeways along a nearly 100-mile (160-km) route.“I don’t have a house. I don’t have a job. I have nothing,” said Mercedes Lopez, 50, whose family fled north from the Florida Keys town of Marathon last Friday and rode out the storm at an Orlando hotel, only to learn their home was destroyed, along with the gasoline station where he worked.“We came here, leaving everything at home, and we go back to nothing,” Lopez said. His and three other families from Marathon planned to venture back today to salvage what they can.Initial damage assessments found 25 percent of homes in the Keys destroyed and 65 percent with major damage, according to Brock Long, administrator of the Federal Emergency Management Agency (FEMA).“Basically every house in the Keys was impacted,” he told reporters.The islands were largely evacuated by the time Irma barreled ashore on Sunday as a Category 4 hurricane, packing sustained winds of up to 130 miles per hour (215 km per hour).Two days later authorities began allowing re-entry to the islands of Key Largo, Tavernier and Islamorada for residents and business owners only. The extent of the devastation took many by surprise.“I expected some fence lines to be down and some debris,” said Dr. Orlando Morejon, 51, a trauma surgeon from Miami as he hacked away at a tree blocking his Islamorada driveway. “We were not expecting to find someone else’s sailboat in our backyard.”The walls of nearby trailer homes were left ripped wide open, exposing insulation and the sodden interiors of bedrooms and kitchens to the elements.At the Caloosa Cove Resort and Marina, concrete pilings meant to hold the dock in place had been knocked sideways, and three manatees lolled in the water, drinking from an outflow pump spitting water from the dockside.Marilyn Ramos, 44, spent the morning cleaning sand and seaweed that had covered her Cuban restaurant Havanos when she arrived early yesterday.“I’m trying to stay calm and see how we can work through this,” Ramos said. “It’s devastating.”A short distance away, the scent of decaying seaweed hung heavy in the air as Brooke Gilbert, 15, stood with her younger sister staring at the jumble of concrete and twisted metal left from the three-story condo that was their family’s getaway home.“There’s the couch right there,” she said. “I recognize the clothes in that closet. They belong to my grandmother.”At the end of Islamorada, roughly the halfway point of the Keys, police at a checkpoint turned around returning residents seeking to travel farther south and waved through utility crews, law enforcement and healthcare workers.Authorities said they were barring re-entry to the remainder of the Keys to allow more time to restore electricity, water, fuel supplies and medical service. U.S. officials have said some 10,000 residents of the Keys stayed put when the storm hit and may ultimately need to be evacuated.Some 5.8 million homes and businesses were still without power in Florida and nearby states as of late Tuesday, down from a peak of about 7.4 million on Monday. Florida’s largest utility, Florida Power & Light Co, said western parts of the state might be without electricity until Sept. 22.One of the chief deprivations endured by many Floridians in the storm’s aftermath was difficulty staying cool in the absence of air conditioning, ice and even natural shade from trees knocked down or stripped bare of foliage.“I just pour water on my head a few times a day,” said Lydia Grondin, 29, of Fort Lauderdale.Florida’s largest city, Jacksonville in the northeastern corner of the state, was still recovering from heavy flooding yesterday.While damage across Florida was severe, it paled in scope to the devastation wrought by Irma in parts of the Caribbean, which accounted for the bulk of Irma’s fatalities.The hurricane destroyed about one-third of the buildings on the Dutch-ruled portion of the eastern Caribbean island of St. Martin en route to Florida, the Dutch Red Cross said yesterday.Irma hit the United States soon after Hurricane Harvey, which plowed into Houston late last month, killing about 60 and causing some $180 billion in damage, mostly from flooding.Several major airports in Florida that halted passenger operations due to Irma resumed limited service yesterday, including Miami International, one of the busiest in the United States.Insured property losses in Florida from Irma were expected to run from $20 billion to $40 billion, catastrophe modeling firm AIR Worldwide estimated.Irma was downgraded to a tropical depression late on Monday as it drifted into Alabama, and was likely to dissipate further last evening, the National Hurricane Center said.The centre was monitoring another hurricane, Jose, which was spinning in the Atlantic about 700 miles (1,130 km) west of Florida. 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