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A vicious storm that smacked the central and eastern US Friday is continuing its assault Saturday with whipping winds and blizzard conditions, rain, snow and dangerous coastal flooding. Meanwhile, a brutal blast of Arctic air is spreading south and east through the central US and will bring snow and ice to the South. Here’s the latest.

Snow squalls expected Sunday in New York City: The New York City Emergency Management Department has issued a Weather Alert for Sunday, warning of an arctic cold front expected to sweep through the region in the early afternoon.

In a statement late Saturday, NYC Emergency Management said snow squalls “could lead to rapid reduction in visibility, gusty winds, and briefly moderate to heavy snow, creating hazardous roadway conditions,” noting the forecast called for wind gusts up to 45 mph in the early afternoon.

New York City Mayor Eric Adams said, “Our teams will be out early salting our streets, and we will continue to monitor the forecast every step of the way. We are also asking that New Yorkers take their own precautions.”

More than 311,000 homes and businesses in the dark: Widespread power outages stretched from the Great Lakes to the South Saturday after intense winds, severe thunderstorms and heavy snow walloped several states. Outages peaked late Saturday afternoon at about 550,000.

More than 182,000 customers are without power in Oregon, and nearly 10,000 in Washington, according to the tracking site PowerOutage.us.

Strong winds on the back side of the storm caused power outages to climb throughout the morning in the Great Lakes. As of 3 a.m. ET, Michigan had the second-most utility customers without power – more than 61,000, followed by more than 57,000 customers cut off in Wisconsin.

Strong winds buffet Northwest: Falling trees have toppled power lines, started fires and shut down transit in Portland, Oregon, as high winds and frigid conditions kept emergency workers busy Saturday. Portland Fire and Rescue reported multiple fires in the community started by fallen trees and power lines.

At least two weather-related deaths have been reported in the Portland area since Saturday, according to fire officials.

One person was killed after an RV occupied by four people caught fire. Portland Fire and Rescue says a fallen tree struck the RV, where a stove was being used for heating, causing the stove to ignite the vehicle. Another person was also injured.

The second death occurred approximately 18 miles outside of Portland in Lake Oswego. A man died after a large tree crashed through the second floor of a home, Lake Oswego Fire Marshal Gert Zoutendijk said in a media release.

Portland’s mayor Ted Wheeler declared a state of emergency Saturday through Wednesday. The city is experiencing winds around 30 mph and subzero wind chills Saturday evening, the National Weather Service in Portland reported.

The city’s transit system announced its rail transit service would be closed Saturday because of the weather.

Historic storm surge hits Maine: Water levels on Maine’s coast hit a historic high on Saturday, inundating coastal communities already swamped by record-breaking surges on Wednesday.

Flash flood warnings were issued by the National Weather Service in Gray, Maine, as the storm’s strong winds blew water from the Atlantic Ocean toward the shore on top of high tide Saturday morning and combined with falling rain to create a dangerous situation.

The water level in Portland hit 14.57 feet just after noon, higher than the 13.84 feet hit on Wednesday, and higher than the previous record set in 1978, National Weather Service data shows.

Portland Police Department
Cars sit in floodwaters caused by high tides in Portland, Maine, on Saturday, January 13, 2024.

Portland police said on X that there were “too many” roads closed to list because of the flooding. Roads were also closed in coastal New Hampshire as water levels rose there, according to the state’s department of transportation.

Moderate coastal flooding was also reported in New Jersey, New York, Connecticut, Massachusetts and Rhode Island, NOAA data shows.

Coastal flood alerts remain in effect for several spots throughout the day Saturday for lingering flooding, with most set to expire by the end of the day.

New Jersey floodwaters prompt rescues: In Paterson New Jersey, 20 people were rescued from floodwaters through the night, according to Mayor Andre Sayegh. There are more than 20 streets closures and one bridge closed as streets throughout the city flooded from overnight rainfall from the storm, Sayegh told CNN.

The area remains under a flood warning, according to the National Weather Service. New Jersey Governor Phil Murphy visited one area ravaged by floodwaters on Saturday.

“To all impacted communities here in New Jersey, we are here for you and are committed to getting you the help you need from the federal government.” Governor Phil Murphy said in a post on X, formerly Twitter.

Gary Hershorn/Corbis News/Getty Images
Water from the Hudson River overflowed a river wall on January 13, 2024, in Jersey City, New Jersey.

Buffalo Bills playoff game postponed: The scheduled game between the Bills and Pittsburgh Steelers in Buffalo was moved from Sunday at 1 p.m. to Monday at 4:30 p.m. because of the “dangerous conditions,” New York Gov. Kathy Hochul said on X Saturday.

Strong winds from the storm blowing across an exceptionally warm, ice-free Lake Erie will produce heavy lake-effect snow through Monday morning. One to 3 feet of snow could fall, with the highest totals coming where the bands of snow persist the longest.

“Winds gusting as high as 65 mph early in the event will diminish somewhat late Saturday night. Blizzard conditions will be possible at times, especially Saturday night and Sunday,” the weather service in Buffalo said.

In Erie County, New York, which includes Buffalo, officials have declared a state of emergency starting Saturday due to the incoming storm and snow, county executive Mark Poloncarz announced.

A travel ban was also set to go into effect at 9 p.m. ET Saturday for Erie County to help crews clear the roads given the intense snowfall to come.

Brendan McDermid/Reuters
A snowy, cold scene in Des Moines, Iowa, on January 13, 2024.

Iowa is the epicenter for blizzard conditions and cold: Most of Iowa was under a blizzard warning Saturday as 6 to 10 inches of previous snowfall was whipped up by wind gusts of more than 40 mph. Back-to-back storms hammering the Midwest have resulted in the snowiest week for Des Moines since 1942.

The Iowa State Patrol responded to 535 motorist assist calls and 86 crashes by Saturday afternoon as whiteout conditions pounded the state, the agency said in a social media post.

Bone-chilling cold began to envelop the state and is expected to make for the coldest Iowa caucuses on record Monday. Wind chills as low as minus 45 degrees were forecast by Sunday morning, cold enough to cause frostbite on exposed skin in as little as 10 minutes.

Deb Cram/USA Today
A person makes his way to the Omni Mount Washington Resort toward the Nikki Haley event during a bad snow storm in Bretton Woods, New Hampshire, on Tuesday, January 16.
Andrew Kelly/Reuters
People walk in New York's Central Park on January 16. Enough snow fell in New York, Philadelphia, Baltimore and Washington, DC, to end nearly two-year-long waits for an inch of snow there.
Mark Zaleski/The Tennessean/USA Today Network
Icicles hang from limestone along Interstate 65 in Nashville, Tennessee, on January 16.
Will Lanzoni/CNN
Snow falls on parked cars in Concord, New Hampshire, on January 16.
Rogelio V. Solis/AP
A worker spreads a composite of ice melter and salt on sidewalks at the Mississippi State Capitol in Jackson on January 16.
Nam Y. Huh/AP
A snow-covered school bus sits in a parking lot in Wheeling, Illinois on January 16. School districts in more than half a dozen states announced closures amid frigid temperatures.
Amanda Andrade-Rhoades/Reuters
People pass through a snowy Rock Creek Park in Washington, DC, on Monday, January 15.
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Isaac Hammond braves subzero temperatures to caucus in Malcolm, Iowa, on January 15. Monday's caucuses were the coldest ever, with high temperatures below zero across much of the state.
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A family waits for their delayed flight at the Austin-Bergstrom International Airport in Austin, Texas, on January 15. Thousands of flights have been canceled or delayed.
Christian Monterrosa/AFP/Getty Images
Snow and ice surround the Iowa State Capitol in Des Moines on January 15.
Dan Busey/The TimesDaily/AP
Daniel Cole uses a plastic spoon to clear ice from his vehicle in Florence, Alabama, on January 15.
RJ Sangosti/MediaNews Group/The Denver Post/Getty Images
Crews work to de-ice an airplane at Denver International Airport on January 15.
Jeffrey T. Barnes/AP
Workers remove snow from Highmark Stadium in Orchard Park, New York, on Sunday, January 14. The NFL playoff game between the Buffalo Bills and the Pittsburgh Steelers was pushed back a day due to dangerous blizzard conditions.
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A wrecked tractor-trailer is seen on the eastbound side of Interstate 80 near Williamsburg, Iowa, on January 14.
Barbara J. Perenic/Columbus Dispatch/USA Today Network
A person clears a sidewalk in front of condominiums in Worthington, Ohio, on January 14.
Al Drago/Bloomberg/Getty Images
Cows graze through the snow in Atlantic, Iowa, on Saturday, January 13.
Gary Hershorn/Corbis News/Getty Images
Water from the Hudson River overflows at high tide as a woman jogs in Jersey City, New Jersey, on January 13.
Brendan McDermid/Reuters
Snow and ice dust a worker who was removing snow from a sidewalk in Des Moines on January 13.
Joseph Prezioso/AFP/Getty Images
Storm waves batter coastal homes in Winthrop, Massachusetts, on January 13.
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Travelers check their flight status at Chicago's O'Hare Airport, on Friday, January 12. More than 2,000 flights were canceled nationwide because of the winter storm.
Andrew Harnik/AP
Workers shovel sidewalks in Ankeny, Iowa, on January 12. The vast majority of Iowa was under a blizzard warning.
Eric Seals/USA Today
Vehicles slowly make their way along Northwestern Highway in Farmington Hills, Michigan, on January 12.
Antonio Perez/Chicago Tribune/TNS/Zuma
Rebecca Zimmerman walks beside her bicycle on her way to work in Oak Park, Illinois, on January 12.
Erin Hooley/AP
Snow falls on January 12 as migrants in Chicago continue to be housed by the city in "warming" buses.
Will Lanzoni/CNN
Snow piles up outside Drake University's Olmsted Center ahead of CNN's Republican presidential debate in Des Moines on Wednesday, January 10.
Sam Wolfe/Reuters
A man looks over a heavily damaged oak-barrel factory in Bamberg, South Carolina, on January 10, a day after a tornado struck the city.
Bryan Woolston/AP
An employee of the Storm Bros. Ice Cream begins to clean up January 10 after the storm left more than 2 feet of water inside many businesses in downtown Annapolis, Maryland.
Dan Powers/USA Today Network
Kelly-Jo St. Aubin clears snow from the sidewalk outside her home in Kaukauna, Wisconsin, on January 9.
Peter Zay/Anadolu/Getty Images
Firefighters rescue a man after his car was stuck in a flooded area in Charlotte, North Carolina, on January 9.
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Because of the storm, nearly 2,000 migrants in Brooklyn, New York, were evacuated from tents at Floyd Bennett Field and taken to a local high school on January 9.
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A pedestrian navigates a snow-covered sidewalk in Iowa City, Iowa, on January 9.
Jaide Garcia/CNN
A house is damaged in Panama City Beach, Florida, on January 9. Responders rescued people from structures in Florida's Bay County, where multiple tornadoes hit the ground and caused significant damage and road closures, Bay County Sheriff Tommy Ford said.
Gregg Pachkowski/USA Today Network
Linda Cox looks at her two vehicles that were damaged by a fallen tree in Myrtle Grove, Florida.
Mike De Sisti/The Milwaukee Journal/USA Today Network
Snow covers the trees around the Holy Hill Basilica and National Shrine of Mary in Hubertus, Wisconsin, on January 9.
Joe Raedle/Getty Images
People in Des Moines help push a vehicle back onto the road after it became stuck in the snow on January 9.
SCV/Michael Gordon
Tornado wreckage is seen in Bay County, Florida, on January 9. Twelve tornadoes were reported across Florida, Alabama and Georgia that morning.
Tariq Zehawi/NorthJersey.com/USA Today Network
Workers Brian Henderson and Josko Huljev fill sandbags for residents of Totowa, New Jersey, on January 9. New Jersey Gov. Phil Murphy announced a state of emergency to prepare for the potentially dangerous weather.
Alex Hicks Jr./Spartanburg Herald-Journal/USA Today Network
Flooding is seen at an intersection in Spartanburg, South Carolina, on January 9.

Freezing cold for 75% of the US: It’s not just Iowa, 75% of the country will experience temperatures below freezing over the next 7 days as a potent blast of Arctic air plunges south.

Fifty-five million of them will endure temperatures below zero. The temperatures will feel even colder when coupled with wind. A wind chill of minus 71 degrees was recorded in Navajo, Montana, Saturday morning.

Bitter cold tees up South snow and ice: Temperatures well below average will fully envelop the South and parts of the Southeast by Tuesday.

A new storm system will track through the cold air and start to put out snow, sleet and ice as soon as Sunday afternoon in parts of Oklahoma and Texas.

Any wintry precipitation that falls Sunday will hang around on untreated surfaces because of the cold, making for a potentially treacherous Monday morning commute in places like Dallas.

The system will then leave a shot of modest snow from west to east across Arkansas, northern Louisiana, Mississippi and Alabama and into Tennessee. Points to the south are more likely to see ice than snow.

View this interactive content on CNN.com

Arkansas looks set to receive some of the most snow from the event. Six inches or more could fall in parts of the state. Arkansas Gov. Sarah Huckabee Sanders declared a state of emergency Friday ahead of the bitter cold and snow.

Louisiana Gov. Jeff Landry announced a state of emergency in effect from Sunday through Wednesday for the storm and cold as well.

CNN’s Eric Zerkel, Taylor Ward, Mary Gilbert, Allison Chinchar, Holly Yan, Robert Shackelford, Dave Alsup, Joe Sutton, Sara Smart, Zenebou Sylla, Artemis Moshtaghian, Andy Rose and Nicole Grether contributed to this report.