The worst of Hurricane Michael’s remnants were supposed to track south of tiny Charlotte County in southern Virginia, but a desperate 911 call Thursday night told a different story: A car had been washed away in a torrential flash flood. When sheriff’s deputies raced to the scene on Mount Harmony Road after 11 p.m., county administrator Daniel Witt said they heard the screams of a 17-year-old boy clinging to a guardrail. The sheriff’s deputies and some bystanders linked arms and waded into the raging water, before tossing the teen a rope. He was pulled to safety, but his father and...