Two people are dead and at least six others remain missing Tuesday in Johnson County, Kentucky, where flash floods destroyed about 150 homes and damaged several hundred others, state and local authorities said. A man drowned in floodwaters in Flatgap after he got out of his car Monday night, and an elderly woman was discovered Tuesday afternoon in debris near Volga, Kentucky State Police said. The severe weather, which is expected to move east to the Tennessee Valley and the East Coast Wednesday, is the product of unstable air interacting with an unseasonably strong and active jet stream, said Danielle Banks, a meteorologist for The Weather Channel.