Historic, life-threatening flooding is expected through the next 48 hours. In some parts of the Carolinas, storm surge could reach eight feet. Evacuation orders cover about 830,000 people along the South Carolina coast, and more than 1,500 of them are in 28 shelters statewide. The storm is bringing 115 mph winds, along with up to 15 inches of rain. Tony Dokoupil reports.