Deep Freeze: State by State
Frigid, subzero temperatures and winter weather descended across a wide swath of the central and eastern United States on Sunday, with temperatures expected to plummet further overnight.
Some Midwestern residents were digging out from nearly a foot of snow that fell by Sunday afternoon, and grocery stores there sold out of essentials. Hazardous travel conditions in many states led to canceled flights and prompted warnings from transportation officials that only those who absolutely need to venture out should do so. Some schools canceled Monday classes, and local governments and charities worked to be sure shelters were available for anyone who needed them.
Even the South will be affected by the "polar vortex" of cold air, with temperatures there set to fall well below normal on Monday and Tuesday.
Temperatures are expected to dip into the 30s in parts of Florida on Tuesday, but the state's citrus industry isn't expecting any damage to crops. A spokesman for Florida Citrus Mutual said it must be at 28 degrees or lower for four hours straight for fruit to freeze badly.
Illinois residents were digging out of more snow Sunday afternoon - as much as 10 inches in some parts of the state. Authorities urged residents to stay indoors and to check up on the elderly or disabled.
A winter storm dropped 8 inches on parts of northern Indiana by Sunday afternoon, and some areas could see up to a foot. Gov. Mike Pence ordered nearly 100 Indiana National Guard members to be ready to help rescue stranded motorists, move people to shelters and assist local emergency services workers in reaching people who need medical help.
The state General Assembly postponed Monday's opening of its 2014 session.
Even though the initial forecast for snow has been scaled back, flights for Monday and Tuesday were canceled at Barkley Regional Airport in Paducah. Organizations including churches and the Salvation Army were planning to open warming centers in some cities.
With two frigid nights on the way, New Orleans' city government said its freeze plan is in effect. All shelters will be open free of charge to people who need to get out of the cold. The city also encouraged residents to check on neighbors and the elderly.
The harshest winter conditions in 20 years are heading for Michigan's Lower Peninsula, with up to 15 inches of snow forecast for parts of the state by late Sunday followed by temperatures diving as low as minus 15.
The cold snap that the National Weather Service is calling "historic and dangerous" has arrived in Minnesota. Temperatures were in the single digits below zero in the Twin Cities area Sunday afternoon, and temperatures are expected to dip between 25 below and 40 below overnight, with wind chills plummeting to between 55 below and 65 below zero.
Heavy snow combined with strong winds and cold created dangerous conditions Sunday in much of Missouri, prompting warnings that only those who absolutely need to venture out should do so. The state Department of Transportation said it was so cold the salt used to melt ice and snow wasn't very effective and that conditions were so bad they were endangering those driving the plows and trucks.
Officials are warning that frostbite and hypothermia are possible if Nebraska residents aren't prepared for the cold moving into the state Sunday afternoon. The Nebraska Humane Society urged pet owners to bring their animals inside.
Weather-weary New Jersey residents got a short-lived respite Sunday, as warmer temperatures started to melt the snow and ice spawned by last week's major storm. But forecasters say frigid temperatures will return Monday night, when lows will drop to the single digits and wind chills could reach 15 degrees below zero.
Winter weather caused the cancellation and delay of flights both to and from Nashville and Memphis on Sunday. The Metro Nashville government said it was partnering with local organizations to make sure shelters were available. Some school districts have canceled classes Monday due to the forecast.
The National Weather Service has issued wind chill warnings that take effect Monday evening from the Alleghany Highlands southeast to the Virginia Piedmont, including the Roanoke and New River valleys, and areas west of the Blue Ridge. Those areas could see wind chills of minus 30 degrees.
The deep freeze put a chill on outdoor tailgating at Lambeau Field in Green Bay for the 49ers-Packers game, though tickets were sold out for what could be one of the coldest games in NFL history. It was 5 degrees at kickoff at 3:40 p.m. CST, warmer than expected.