KEY POINTS
  • Florence has weakened, but the worst may be yet to come, former FEMA Southeast director John Copenhaver says.
  • The flooding is likely to be costly, but Copenhaver says cost assessment should come after the basics, like power restoration, trash removal and flood water contamination assessment.

Hurricane Florence and its remnants have weakened, but the worst may be yet to come, John Copenhaver, former Federal Emergency Management Agency Southeast director, told CNBC on Monday.

"It's not safe to say that the worst is over. There's going to continue to be areas where the water will rise, perhaps for a period of several days," Copenhaver said on "Power Lunch."