Dozens killed. Hospital-goers scrambling to rooftops to be whisked away in helicopters. Mayors frantically telling citizens to flee. And inmates desperately removed from a jail directly in the path of floodwaters.Helene has brought a cascade of destruction across the Southeast. The record-breaking storm hit Florida as a hurricane with wind speeds of 140 mph that flattened buildings. It has since weakened to a post-tropical cyclone with 25 mph winds, as floodwaters besieged parts of North Carolina and Tennessee and utilities reported 3.8 million power outages Saturday morning.Hundreds of road closures isolated Western North Carolina amid what Buncombe County has billed as a “catastrophic natural disaster,” in a morning news release from the county. There was no cellular coverage Saturday morning in the county of over 250,000 people. In Asheville, one video posted by ABC 11 showed a house floating away and collapsing into raging floodwaters.Stay safe:These 3 easy mistakes can be deadly a...