WILMINGTON, N.C. - Matthew is long gone from the Atlantic coast early Monday, but the devastation lingers, most notably in North Carolina, where flooded cities are trying to dry out and those downstream are keeping a close eye on rising rivers.

The flooding disaster is forecast to slowly unfold over the next several days as all that rain -- more than a foot in places -- flows into rivers and downstream, likely causing more inundation in many of the same places devastated by a similar deluge from Hurricane Floyd in 1999.

Thousands of people found themselves suddenly trapped in homes and cars during the torrential rains. Rescuers in Coast Guard helicopters plucked some of them from rooftops and used military vehicles to reach others.

The storm killed more than 500 people in Haiti and at least 18 in the U.S.