The primary risks include flash flooding in low-lying and poorly drained urban areas, particularly in New York City. With rainfall rates potentially exceeding the city's drainage capacity, streets and basements could flood, posing risks to residents and vehicles. High winds, with gusts up to 60 mph, may cause tree damage and power outages, further complicating the situation. The timing of the storms during the World Cup match and the evening commute could lead to significant disruptions and safety concerns for residents and visitors.