The heavy rainfall poses a significant risk of flash flooding, particularly in areas already saturated from recent storms. Urban areas, including New York City, are especially vulnerable due to overwhelmed drainage systems, which could disrupt subway operations and road traffic. Counties such as Bergen, Passaic, and Essex in New Jersey, along with Rockland County in New York, are under immediate threat. Commuters and residents in these areas should prepare for delays and potential road closures. The risk of isolated severe weather remains low but cannot be ruled out entirely.