By Brendan O’Brien (Reuters) -The death toll in eastern Kentucky rose to 16 on Friday as flooding unleashed by “epic” torrential rainfall swept through homes, washed out roads and pushed rivers and streams over their banks, state authorities said, warning that more fatalities were expected. The National Guard and the State Police used helicopters and boats to rescue dozens of people from homes and vehicles in Kentucky’s Appalachian coal-mining region. Video footage from local media showed floodwaters reaching the roofs of houses and turning roads into rivers. “This isn’t over. While we’re doin…