Drenching rains caused sudden and severe flash flooding across coastal Connecticut, New York, and New Jersey on Sunday, leading to road closures, water rescues, and disruptions to commuter rail services in the tri-state area. The National Weather Service reported that the hardest-hit areas included northern New Jersey, parts of New York's Westchester County, and coastal regions of Connecticut along Interstate 95. Flash flood warnings were in effect for much of the morning, with some areas receiving rain at a rate of 1 to 2 inches (2.5 to 5 centimeters) per hour. The heavy rainfall impacted transportation systems, with both Metro-North and Amtrak reporting delays and cancellations on rail lines connecting to New Haven, which serve cities like Norwalk and Bridgeport in Connecticut. Tweed New Haven Airport also closed its departure terminal due to local flooding, advising travelers not to arrive until further notice. State officials, including Connecticut Governor Ned Lamont, urged residents to avoid driving through flooded areas and to stay away from standing water, which can be deceptively dangerous. In coastal Connecticut, particularly between Norwalk and Westport, the rain reached 6 to 7 inches (15 to 18 centimeters) on Sunday morning, with rainfall rates peaking at 3 to 4 inches (8 to 10 centimeters) per hour. Emergency responders in Westport conducted 13 water rescues of people trapped in vehicles, according to the fire department. Social media posts showed flooded downtown areas with businesses submerged in water. Officials warned that even after the rain stopped, standing water and other hazards might still pose risks, advising residents to avoid flooded roads and to let emergency crews work without obstruction. In Bridgeport, the fire department reported responding to numerous calls on Sunday, including using boats to rescue residents from flooded areas. Photos shared showed rescuers helping people from their homes, with some standing in knee-deep water. Similar flooding and rescues were reported in White Plains and other parts of Westchester County in New York. In New Jersey, Paterson Mayor Andre Sayegh noted that emergency crews rescued about 20 people from rising floodwaters, including a woman who fell out of her wheelchair and floated in the street. While no deaths or severe injuries were immediately reported, videos showed cars nearly submerged in some areas. As the rain eased and the skies cleared, the annual Dominican parade in Paterson, New Jersey, began Sunday afternoon with a slight delay. Organizers expressed their determination to continue celebrating their cultural heritage despite the weather, stating, "The rain won't stop us from celebrating our culture, pride, and community!"