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 The Great Labor Day Hurricane of 1935 was so powerful that it sand-blasted clothing off of people who got caught in its vicious winds, destroyed nearly every structure in the Upper Keys and killed about 500 victims. 
 
 "People were picked up and thrown around like rag dolls," said Brad Bertelli, curator of the Keys History & Discovery Center in Islamorada. "Bodies were blown all the way across Florida Bay to Cape Sable." 
 
 Wednesday marks the 80th anniversary of the most intense Category 5 system to strike the U.S. coastline. 
 
 It was stronger than Hurricane Camille, which clobbered Mississippi in August 1969, as well as Hurricane Andrew, which devastated south Miami-Dade County in August 1992 – both being the only other Category 5 storms in recorded history to hit the United States. 
 
 When it barreled across the Upper Keys on Sept. 2, 1935, the Labor Day hurricane was packing sustained winds of 185 mph, the same destructive power as an EF4 tornado. 
 
 "It was tightly wound, like Andrew, with a swath of destruction about 40 miles wide," Bertelli said. "Most of the damage was between Tavernier and Duck Key." 
 
 State Archives of Florida/Courtesy Henry Flagler’s railroad was destroyed by the 1935 hurricane. The train made its last trip from Miami to Key West on the day the hurricane struck. Henry Flagler’s railroad was destroyed by the 1935 hurricane. The train made its last trip from Miami to Key West on the day the hurricane struck. (State Archives of Florida/Courtesy) (State Archives of Florida/Courtesy) 
 
 The system produced a storm surge of 18 to 20 feet above sea level, knocking down trees and buildings on Matecumbe, Islamorada and other nearby Keys. It also destroyed Henry Flagler's railroad, which connected Key West to the mainland. 
 
 "That was the last day Henry Flagler's train made the trip from Miami to Key West," Bertelli said. 
 
 Many of the victims drowned when they were swept by towering waves into either the Gulf of Mexico or the Atlantic. Among those who perished were 259 World War I veterans, who had been building the Overseas Highway and were living in federal rehabilitation camps. 
 
 Jerry Wilkinson / Courtesy A year after the 1935 Labor Day Hurricane hit, the Florida Keys Memorial, a 17-foot-tall monument, was built on Upper Matecumbe Key to remember the storm’s victims. A year after the 1935 Labor Day Hurricane hit, the Florida Keys Memorial, a 17-foot-tall monument, was built on Upper Matecumbe Key to remember the storm’s victims. (Jerry Wilkinson / Courtesy) (Jerry Wilkinson / Courtesy) 
 
 A train had been dispatched to rescue them from the storm, but it arrived too late and was swept off its tracks by the storm surge. Of some consolation, Bertelli said, "none of the people on the train died." 
 
 At the time, only about 600 to 700 people were living in the Upper Keys or the death toll would have been much higher, he said. 
 
 After roaring through the Keys, the hurricane curved north, paralleled Florida's west coast and made a second landfall near Cedar Key as a Category 2 hurricane on Sept. 4. 
 
 In the immediate aftermath of the storm, legendary author Ernest Hemingway traveled to the Keys to help with the recovery. He ended up writing an angry article entitled, "Who Killed the Vets?" for New Masses magazine. 
 
 In a letter to his editor, Max Perkins, Hemingway wrote, "We made five trips with provisions for survivors to different places but nothing but dead men to eat the grub." 
 
 While it took years for the Keys to fully recover, residents started rebuilding almost immediately, and some area schools reopened in 1936, Bertelli said. 
 
 "Residents of that area were a hardy bunch," he said. 
 
 The storm highlighted the need to evacuate the Keys well in advance of a threatening storm, because the two-lane highway – the only way in and out of the island chain – easily jams. 
 
 A year after the hurricane, the 17-foot-tall Florida Keys Memorial was built on Upper Matecumbe Key in memory of the storm victims. 
 
 This year, authorities in the Upper Keys will hold memorial ceremonies on September 2. 
 
 "There are many third or fourth generation family members, who heard stories while growing up," said Jill Miranda Baker, executive director of the Keys History & Discovery Center. "The memories have not faded." 
 
 kkaye@tribpub.com
– The strongest landfall in US history was the Great Labor Day Hurricane, whose 185mph winds walloped Florida's Upper Keys in 1935. The Sun Sentinel in August 2015 took a look back at the deadly storm on its 80th anniversary, opening with this ominous line: It "was so powerful that it sand-blasted clothing off of people who got caught in its vicious winds." USA Today echoes that, more gruesomely: "Some people were literally sandblasted to death." In 2014, the Miami Herald reported 423 bodies were found in the immediate wake of the storm; 259 of those who died were WWI veterans who were constructing the Overseas Highway through the Keys and were living in government camps. Some islands were only connected via railroad bridges at the time, explained the Herald, and though a train was sent to evacuate the veterans, it ended up getting caught up in the storm surge. The railroad never resumed operation. The hurricane was one of only three Category 5 storms to have hit the US in recorded history, the others being Hurricane Camille in 1969 and Hurricane Andrew in 1992. But USA Today notes another storm reigns as the deadliest: a 1900 hurricane that ravaged Galveston, Texas, and killed as many as 8,000. (Here's how to keep tabs on Irma.)