Residents in the tri-state area, including New York City, New Jersey, and Connecticut, should prepare for potentially hazardous conditions. Flash flooding could impact low-lying areas and urban locations, while isolated tornadoes pose a risk to structures and safety. Damaging wind gusts may lead to downed trees and power outages, and hail could cause localized damage. The faster movement of these storms may reduce the flooding threat compared to Saturday's system, but risks remain significant. (Source: NBC New York)