SOUTH WINDSOR, Conn. – When winter’s white mixes with autumn’s orange and gold, nature gets ugly.

A freak October nor’easter knocked out power to more than 3 million homes and businesses across the Northeast on Sunday in large part because leaves still on the trees caught more snow, overloading branches that snapped and wreaked havoc. Close to 2 feet of snow fell in some areas over the weekend, and it was particularly wet and heavy, making the storm even more damaging.

Additional Photos

With leaves still on a maple tree behind him, Drew Klein-Robbenhaar of K-R Farm in Acton shovels a path in front of his farm stand Sunday. Shawn Patrick Ouellette/Staff Photographer

“You just have absolute tree carnage with this heavy snow just straining the branches,” said National Weather Service spokesman Chris Vaccaro.

From Maryland to Maine, officials said it would take days to restore electricity, even though the snow ended Sunday.

The storm smashed record snowfall totals for October and worsened as it moved north. Communities in western Massachusetts were among the hardest hit. Snowfall totals topped 27 inches in Plainfield, and nearby Windsor had gotten 26 inches by early Sunday.

The storm was blamed for at least nine deaths, and states of emergency were declared in New Jersey, Connecticut, Massachusetts and parts of New York.

Roads, rails and airline flights were knocked out, and passengers on a JetBlue flight were stuck on a plane in Hartford, Conn., for more than seven hours. And while children across the region were thrilled to see snow so early, it also complicated many of their Halloween plans.

Sharon Martovich of Southbury, Conn., said she hoped the power will come back on in time for her husband’s Halloween tradition of playing “Young Frankenstein” on a giant screen in front of their house. But no matter what, she said, they will make sure the eight or so children who live in the neighborhood don’t miss out on trick-or-treating.

“Either way we will get the giant flashlights and we will go,” she said.

More than 800,000 customers were without electricity in Connecticut alone — shattering the record set just two months ago by Hurricane Irene. Massachusetts had more than 600,000 outages, and so did New Jersey — including Gov. Chris Christie’s house. Parts of Pennsylvania, New Hampshire, New York, Maine, Maryland and Vermont also were without power.

“It’s going to be a more difficult situation than we experienced in Irene,” Connecticut Gov. Dannel P. Malloy said. “We are expecting extensive and long-term power outages.”

Thirty-two shelters were open around the state, and Malloy asked volunteer fire departments to allow people in for warmth and showers. At least four hospitals were relying on generators for power.

Many of the areas hit by the storm had also been hit by Irene. In New Jersey’s Hamilton Township, Tom Jacobsen also recalled heavy spring flooding and a particularly heavy winter before that.

“I’m starting to think we really ticked off Mother Nature somehow, because we’ve been getting spanked by her for about a year now,” he said.

It wasn’t just the trees that weren’t ready for a wintry wallop.

Kerry McNiven said she was “totally unprepared” for the storm that knocked out her water and power and sent tree limbs crashing into her Simsbury, Conn., home. She was buying disposable plates and cups in a darkened supermarket, a setting that she said resembled “one of those post-apocalyptic TV shows.”

“They didn’t hype this one as much” as Irene, she said. “I didn’t think it was going to be as bad.”

In Concord, N.H., Dave Whitcher’s company had yet to prep its sanding equipment before the storm dropped nearly 2 feet of snow. His crews were plowing and shoveling parking lots Sunday and will be back today to salt sidewalks and walkways.

Vaccaro, the weather service spokesman, said the snowstorm “absolutely crushed previous records that in some cases dated back more than 100 years.” Saturday was only the fourth snowy October day in New York’s Central Park since record-keeping began 135 years ago.

There usually isn’t enough cold air in the region to support a nor’easter at this time of year, but an area of high pressure over southeastern Canada funneled cold air south into the United States, Vaccaro said. That cold air combined with moisture coming from the North Carolina coast to produce the unseasonable weather.

A few businesses enjoyed the early snow: Ski resorts in Vermont and Maine opened early.

Three people died in Pennsylvania because of the storm, two in an SUV crash in suburban Philadelphia. An 84-year-old Temple man was killed Saturday when a snow-laden tree fell on his home while he was napping in his recliner.

Storm-related traffic accidents also killed people in Connecticut, New York, New Jersey and the Canadian province of Prince Edward Island. A New Jersey man died Saturday in a house fire sparked by a downed power line, and a man in Springfield, Mass., was electrocuted by downed wires.

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