Weather authorities downgraded Hurricane Florence to a tropical depression on Sunday, September 16, but flooding remained a serious threat to the coastal Carolina cities.<br /><br />This video, filmed in Wilmington, North Carolina, shows a neighborhood severely flooded.<br /><br />About 740,000 homes and businesses are still without power, and at least 18 people have died in storm-related incidents. The latest death involved a driver who was killed when they lost control of their pickup truck and struck a tree near Gilbert, South Carolina, local media reported.<br /><br />The National Hurricane Center said Florence is still expected to produce excessive rainfall as it turns from the Carolinas over the Mid-Atlantic and southern New England early this week.