Authorities rescued people trapped by floodwaters, and more than 3 million customers were in the dark across much of the southeastern U.S. as Hurricane Helene weakened to a tropical storm over Georgia early Friday after making landfall overnight in northwestern Florida as a Category 4 storm.Video above: Watch continuous live coverage of Helene from Savannah sister station WJCLHelene came ashore amid warnings from the National Hurricane Center that the enormous system could create a “nightmare” storm surge. There were at least five storm-related deaths.Video on social media sites showed sheets of rain coming down in Perry, Florida, near where Helene made landfall, and siding being torn off buildings. One local news station showed a home that had flipped over. The community and much of surrounding Taylor County were without power.In Citrus County, some 120 miles south of Perry, first responders were out in boats early Friday to rescue people trapped …