At least four deaths linked to storm amid warnings of flash flooding that could stretch into AppalachiansAs what was left of Hurricane Isaias moved north on Sunday, bringing moderate to heavy rainfall across the central Appalachians and the mid-Atlantic region, nearly 396,000 customers across the Florida Panhandle and southern Alabama remained without power.Heavy rainfall associated with the storm could bring isolated flash flooding and strong wind gusts and remain a threat across the south-east