Deep Freeze

Arctic air has descended over the Northeast as the region experiences the kind of temperatures that have left the Upper Midwest shivering for days.

A man de-ices a United Airlines airplane before it takes off from JFK International Airport in New York Jan. 26. Adrees Latif / Reuters
People play in the snow at the Winter Jam in Central Park on Jan. 26 in New York City. The annual festival brings skiing, snowboarding and snowshoeing to New Yorkers with free equipment. Mario Tama / Getty Images
Young men participate in a pickup game of hockey on the frozen reflecting pool in front of the U.S. Capitol in Washington, D.C., on Jan. 26. Below-freezing temperatures over the past few days have made conditions ideal for the skaters. Karen Bleier / AFP - Getty Images
Railyard signalman Phil Smith uses a portable propane torch to thaw the track switches after recent snowfall at the Norfolk Southern Roanoke Terminal in downtown Roanoke, Va. Freezing temperatures are expected to continue through the weekend. Don Petersen / AP
Debbie Dukes scrapes the ice off her daughter's sport utility vehicle Friday morning, Jan. 25, in Owensboro, Ky. Capping off a brutal week of frigid conditions and subzero wind chills, residents across much of the country on Friday were still experiencing some of the coldest temperatures in years -- with southern states getting a rare icy blast. John Dunham / the Messenger-Inquirer via AP
A jogger runs with two dogs in the snow along the north side of Lakeshore Drive in Chicago on Jan. 25. More than an inch of snow fell in Chicago Friday, ending the city's 335-day streak of no more than an inch of snow accumulation in one day. The previous record stretch of no snow of 310 days was set in 1940, the Chicago Tribune reported. Friday's snowfall also marked the latest it has gone in the season before an inch of snow has fallen. Nam Y. Huh / AP
Ice-encrusted Dennis Ring, of the Middleton Fire Department, works at the scene of a four-alarm fire in a brick business building in Lawrence, Mass., on Jan. 24. Elise Amendola / AP
A pedestrian bundled up against the cold walks through the streets of Manhattan on Jan. 24. Frigid arctic air held the U.S. Midwest and Northeast in its icy grip on Wednesday, with the cold so dangerous that municipal emergency warming centers opened up and ski resorts shut down. John Moore / Getty Images
Erin Leighton sips a coffee while seated next to a frost-covered window at a coffee shop Jan. 24 in Portland, Maine. An arctic cold front with sub-zero temperatures continues to grip the region. Robert F. Bukaty / AP
A fountain partially-covered by ice is seen at Bryant Park in New York on Jan. 24. January 24, 2013. Eduardo Munoz / Reuters
The White House walkway is cleared of fresh snow which fell overnight on Jan. 24, 2013. Arctic air kept a cold blanket of misery over the Northeast Thursday as the region experienced the kind of temperatures that have left the Upper Midwest shivering for days. Larry Downing / Reuters
With the temperature at minus 6 degrees Fahrenheit, steam vapors from the Sappi paper mill dissipate into the early morning sky in Westrbook, Maine, Thursday morning, Jan. 24, 2013. Robert F. Bukaty / AP
Chicago Fire Department Lt. Charley De Jesus walks around an ice-covered warehouse on Jan. 23. The warehouse caught fire the night before. Fire department officials said it is the biggest fire the department has had to battle in years and one-third of all Chicago firefighters were on the scene at one point or another trying to put out the flames.

PhotoBlog: Icicles cover smoky remains of massive Chicago blaze. John Gress / Reuters
A man is bundled up against the cold on New York's 34th Street in Midtown Manhattan on Jan. 23. The temperature was around 12 degrees, but with wind gusts of 15-20 mph, it felt more like five below as people started their day in New York City. Mark Lennihan / AP
A man walks his dog across Lake Harriet near Minneapolis (background) on Jan. 23. The Upper Midwest remained locked in a deep freeze Wednesday, with bitter sub-zero temperatures and wind chills stretching into a fourth day across several states due to waves of frigid Arctic air. Eric Miller / Reuters
People walk their dogs at Castle Island in Boston on Jan. 23. Michael Dwyer / AP
Steve Tannen wears heavy clothing to protect himself against freezing wind chills as he practices for an upcoming bike race in northern Minnesota near Lake Harriet in Minneapolis, on Jan. 23. Eric Miller / Reuters
Icicles hang from pipes inside the Times Square subway station in New York on Jan. 23. New York City commuters faced temperatures in the teens on their way to work Wednesday morning and the National Weather Service warned that prolonged exposure to the arctic air can cause frostbite and hypothermia. Donald King / AP
The temperature on Jan. 23 read 9 degrees as a pedestrian makes her frigid walk on Spruce Street in downtown Scranton, Pa. Butch Comegys / The Scranton Times-Tribune via AP
People are bundled up against the cold on New York's 34th Street in Midtown Manhattan on Jan. 23. Mark Lennihan / AP
Bundled up against the extreme cold, Julie Caruso of Akron, Ohio, waits in a long line for a tour of the White House on Jan. 22. Kevin Lamarque / Reuters
Commuters bundle up against extreme cold Jan. 22 in Chicago. M. Spencer Green / AP