SIOUX FALLS, S.D. (AP) -- It's already cold but it's going to be getting even colder in a wide swath of the nation.
The Midwest, New England and even the South will be affected by a deep freeze, with potential record-low temperatures heightening fears of frostbite and hypothermia.
It hasn't been this cold for decades.
One meteorologist says, "If you're under 40 (years old), you've not seen this stuff before."
The frigid air will begin Sunday and extend into early next week. It will reach as far south as the Gulf Coast. Blame it on a "polar vortex," as one meteorologist calls it, a counterclockwise-rotating pool of cold, dense air.
The predictions are startling: 25 below zero in Fargo, N.D., minus 31 in International Falls, Minn., and 15 below in Indianapolis and Chicago. At those temperatures, exposed skin can get frostbitten in minutes and hypothermia can quickly set in as wind chills may reach 50, 60 or even 70 below zero.
Even wind chills of 25 below zero can do serious damage.
Many states hit by snow, bitter cold; more ahead -
A winter storm dumped snow from the Midwest to New England and brought along teeth-chattering temperatures was blamed for at least 16 deaths. Freezing temperatures with below-zero wind chills in some places complicated life for residents from Minnesota to Maine and more cold blasts were in the forecast for the weekend and Monday.
A 22-year-old man was fatally injured in one of more than 200 weather-related accidents reported in the state. Much of the state received 4 to 8 inches of snow.
Transportation officials asked people to stay home Friday as total snowfall reached 7 inches in some areas.
DISTRICT OF COLUMBIA
Offices of the federal government and the District of Columbia were open Friday, but workers were given the option to take leave or work from home after more than 2 inches of snow fell.
Nearly 17 inches of snow fell Thursday in some of Chicago's northern suburbs, and more than 12 inches of snow was recorded at Midway International Airport. The weather was blamed for two deaths, including a man who died in southern Illinois after having a heart attack while clearing snow. The National Weather Service said Chicago-area wind chills Monday and Tuesday could sink to 45 below zero.
Two deaths were blamed on the weather. Indianapolis' mayor urged residents to stock up on supplies in advance of more heavy snows and sub-zero readings. Fort Wayne set a record low Friday morning at minus-10 degrees.
Slicks roads caused dozens of wrecks, and weather-related accidents were blamed for two deaths.
Maine was spared the brunt of the snow, but residents suffered from sub-zero temperatures with wind chills making it feel like 35 degrees below zero in some places. Temperatures will gradually warm up into the 20s by Saturday afternoon.
Up to 7 inches of snow fell north of Baltimore on Friday. State officials restricted traffic on several bridges, including the Chesapeake Bay Bridge, after reports of sustained winds exceeding 50 mph Friday morning.
Snow totals of nearly 2 feet of snow in some areas and wind chills well below zero were reported Friday. The National Weather Service said the temperature in Boston was 2 degrees Friday morning but felt like 20-below. Boston had more than 13 inches of snow, with higher amounts north of the city, including 23.8 inches in Boxford. Coastal flooding damaged homes in Scituate.
Three days of snow and bitter cold left the Detroit area under almost a foot of snow. More snow is expected late Saturday and Sunday. And colder weather is forecast for Monday. Officials blamed one death on the weather.
Minnesota's governor called off all public school classes Monday because of another cold blast in the forecast. Police said the cold contributed to the death of a 79-year-old man who fell outside his home in New Ulm, where temperatures dropped down to minus-18 degrees.
A deep freeze stayed in place with temperatures in the single digits to below zero and wind chill readings ranging from minus-15 to minus-35. Snow accumulations ranged from about 7 through 11 inches and numerous schools remained closed for a second straight day.
New Jersey schools, government offices and businesses closed Friday after more than 10 inches of snow accumulated in some places. A New Jersey Transit bus slid backward down an icy hill in Paterson and crashed into a carpet store. The driver, the only person on the bus, had minor injuries. More than one-fourth of Friday's outgoing flights at Newark Liberty Airport were canceled.
New York City, where 6 to 11 inches of snow was recorded, urged the homeless to find shelter as single-digit temperatures followed the storm. Flights out of John F. Kennedy Airport were suspended for a time Friday because of winds and visibility. A woman with Alzheimer's disease froze to death after wandering away from her rural western New York home and two other deaths were also blamed on the weather.
Three Appalachian Trail hikers were hospitalized Friday after being stranded overnight in the snow without shelter. Wind chills were near 20 degrees below zero and snow drifts were up to 2 feet high.
Some of the coldest temperatures in the state in years were recorded Friday, but it's expected to be even colder in the next few days. Authorities say at least two people were killed in weather-related crashes in northeast Ohio on Thursday as the storm dumped up to 10 inches of snow around Cleveland and Toledo.
Pittsburgh's mayor-elect moved his Monday inauguration ceremony indoors because of temperatures forecast between the teens and minus-10. Authorities said a worker at a suburban Philadelphia road salt storage facility died Thursday when a 100-foot-tall pile of salt fell and crushed him on a backhoe.
Most schools were closed due to snow and single-digit temperatures and winds that made it feel like minus-20 overnight in Warwick. Communities across the state opened warming centers at libraries, senior centers and other buildings.
Low temperatures -- minus-8 in Burlington -- and a foot or more of snow made for ideal ski and snowmobile conditions. A wind chill of 29 below was recording in Burlington.
Highs only in the teens prompted many schools to close or open late as some areas in the eastern part of the state received up to 6 inches of snow.
A man found on a sidewalk outside his Milwaukee home Friday died of hypothermia resulting from bitterly cold temperatures. The man's core body temperature was 45 degrees, according to the Milwaukee County Medical Examiner's Office. Milwaukee officials planned to close non-essential services Monday because of expected dangerously cold temperatures.