A powerful nor'easter — a type of coastal storm that draws its name from the northeasterly winds it produces — swept along the US East Coast on Saturday, bringing dangerous flooding, widespread power outages and travel disruption to tens of millions of people from Virginia to Maine. The governors of New York and New Jersey declared states of emergency ahead of the worst conditions, as the National Weather Service warned of "dangerous coastal flooding and beach conditions, strong winds and heavy rainfall" across the region, including New York City and Boston.

The storm claimed at least one life: an employee of the New York City Housing Authority was killed by a falling tree in the Brooklyn borough. At its peak, roughly 100,000 homes and businesses lost electricity across the Northeast, with that figure gradually declining through Saturday evening. Coastal communities bore the brunt of the storm's fury — in the New Jersey borough of Surf City, floodwaters rose inside a marina for the first time since Hurricane Sandy in 2012, with the owner reporting missing boats and a 25-foot vessel worth $150,000 blown off its lift. In Ocean City, Maryland, heavy surf eroded beaches and sent water surging into residential canals and backyards. Despite official warnings to stay away from floodwaters, some residents on Long Island, New York, were seen kayaking down inundated streets.

The storm also caused significant travel and event disruptions. More than 400 flights were cancelled and over 3,000 delayed, with Boston Logan International Airport and the Massachusetts island destinations of Martha's Vineyard and Nantucket among the hardest hit. Singer Ed Sheeran cancelled two high-profile concerts at Gillette Stadium in Foxborough, Massachusetts, and the Global Citizen Festival in New York City's Central Park — headlined by Lauryn Hill, Wyclef Jean and John Legend — was also called off. The Boston Red Sox reshuffled their final regular-season series against the Chicago Cubs, ultimately moving a game to Florida to avoid the worst of the weather.

Authorities across the region urged residents to exercise extreme caution. "Anyone who goes in or near the water this weekend is literally gambling with their life," New York Governor Kathy Hochul said. New York City Mayor Zohran Mamdani warned residents not to drive or walk through floodwater. Peak wind gusts were forecast to reach 60–65 mph on Cape Cod and the islands off Massachusetts, with flooding likely to worsen through Sunday due to a full moon amplifying tidal surges north of Atlantic City.

Meteorologists noted that nor'easters are a regular feature of New England autumns, but said this storm arrived somewhat earlier in the season than typical. One added concern is that leaves have not yet fallen from trees, increasing wind resistance and raising the risk of downed branches, power lines and road debris. The storm's slow movement means coastal areas face a prolonged battering, with the National Weather Service's lead forecaster warning of "a lot of high winds, a lot of high tides and heavy rain" persisting for several more days.