Virginia Beach officials have asked for help from the National Guard, including high water vehicles and debris reduction crews.
Officials said Sunday that many streets are flooded, and some have downed trees and power lines.
Emergency shelters were opening at Cox High School in Virginia Beach and Norview High School in Norfolk.
Norfolk officials say a majority of the 911 calls they are receiving are from citizens stranded in flooded vehicles, and that the city will continue to experience flooding through several high tide cycles.
Norfolk officials say the York Street Parking Garage, the Freemason Street Garage and Bank Street Garage are open for free, dry parking through noon Monday.