CHICAGO — The first full day of winter brought a wild mix of weather across the United States on Sunday: ice and high wind in the Great Lakes area and New England, flooding and tornadoes in the South, snow in the Midwest, and record-shattering temperatures in the 60s and 70s along the mid-Atlantic.
The storms were blamed for at least nine deaths across the country, including five people killed in flooding in Kentucky and a woman who died in a tornado in Arkansas.
Snow and ice knocked out power to 400,000 homes and businesses in Michigan, upstate New York, and northern New England, and also left more than 475,000 people without electricity in eastern Canada. It could be days before the lights are back on everywhere.
More than 700 airline flights had been canceled and about 11,000 delayed, according to aviation tracking website FlightAware.com.
The icy weather was expected to make roads hazardous through at least Monday from the upper Midwest to northern New England during one of the busiest travel times of the year.
In Arkansas, authorities said Sunday that a woman was killed after an EF2 tornado with winds of about 130 miles per hour struck in St. Francis County on Saturday, one of two tornadoes reported in the state.
A man found in a field after the twister in St. Francis County was hospitalized in serious condition, while the woman’s 3-year-old granddaughter and 25-year-old daughter were treated at a hospital.
In Kentucky, three victims were pulled from Rolling Fork River on Sunday after their vehicle was swept away by flood water. A fourth person drowned in Carroll County after a four-wheeler overturned in high water, and a fifth body was discovered in Ballard County near a car abandoned in a flooded ditch.
Authorities in Oklahoma blamed three weekend traffic deaths on the rain and ice.
The Oklahoma Highway Patrol said a Hot Springs, Ark., man died Saturday afternoon when the van he was riding in went off icy US 183 just north of Seiling and overturned. A 16-year-old boy died early Saturday after his car crashed and overturned on US 64 near Tulsa, Highway Patrol said. Oklahoma City police said a woman was killed Friday night in a collision on a slick roadway.
High-temperature records for the date fell Sunday for the second straight day in the mid-Atlantic states because of a mass of hot, muggy air from the South.
In New York’s Central Park, the mercury reached 70 degrees, easily eclipsing the previous high of 63 from 1998. Records were also set in Wilmington, Del., (67), Atlantic City (68), and Philadelphia (67). Washington tied its 1889 mark at 72.
Temperatures were expected to return to normal by Monday night and Tuesday, dropping back into the 30s.
Authorities in several states, including Indiana and Ohio, warned drivers to be especially vigilant about flooded roads. In Indiana, the weather service had posted flood warnings along southern and central Indiana streams and predicted the highest flood crests along the East Fork of the White River since April 2011.
Heavy snow in Wisconsin forced dozens of churches to cancel Sunday services. Milwaukee got about 9 inches, Manitowoc 7. Ice and snow in Oklahoma were blamed for three traffic deaths on slick roads.
In New York’s St. Lawrence County, almost 2 inches of ice had accumulated by early Sunday, coating tree limbs and power lines, and a state of emergency was declared to keep the roads clear of motorists.
‘‘It’s a big party weekend . . . before Christmas,’’ county dispatch operations supervisor Jim Chestnut said. ‘‘This put a little bit of a damper onto that.’’
In Vermont, about 16,000 customers lost power Sunday, and the Red Cross opened a shelter at the high school in Enosburg Falls. Emergency Management spokesman Robert Stirewalt said the storm wasn’t as bad as expected, but ice is never a good thing.
In Maine, the ice dipped farther south than originally anticipated, and there were about 19,000 power failures reported.
Despite the freezing rain in Maine, plenty of shoppers ventured to the outlet malls in Kittery, Maine, on the last weekend before Christmas.