Tropical storm Debby slams into South Carolina and threatens devastating flooding as it presses toward the Northeast

​ Tropical Storm Debby is closing in on the South Carolina coast, where it is expected to make a second landfall early Thursday after looming over the Atlantic Ocean. The storm is set to unleash more torrential rains, tornadoes and destructive flooding as it marches northward through the rest of the week, inundating several already-soaked states. Read More Breaking News, Latest News and Videos | CNN