"Sightseers" wanting to see the devastating power of the storm surge first-hand are being urged to leave Great Yarmouth and Gorleston seafronts.
Police are being forced to visit the area to tell groups standing on Gorleston Pier head to move.
They say the sightseers in both the Great Yarmouth and Gorleston areas are putting their safety at "significant risk".
Police are also advising people living in coastal areas not to drive or walk through flooded areas. Riverside Road in Gorleston, between Ferry Hill and Quay Road, will be closed to traffic later this evening and other closures could follow.
Chief Inspector Nathan Clark said: "I can’t stress enough how much danger you are leaving yourself in by standing near the seafront. By standing in these areas you are putting your life at risk, so please move inland for your own safety.”