A man walks past an ice-covered tree along Lake Michigan in Chicago, Illinois, February 2, 2015. A huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week, after leaving more than a foot (30 cm) of snow in the Chicago area. The area was hit with blizzard conditions yesterday, which was followed by a huge temperature drop to well below freezing. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

A MBTA bus sits stuck in a snowbank during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT) 

A woman holds onto her hat against the wind during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

A man digs a car out of the snow on a residential street in the Chicago suburb of Evanston, Illinois, February 2, 2015. A huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week, after leaving more than a foot (30 cm) of snow in the Chicago area. The area was hit with blizzard conditions yesterday and the temperature dropped to well below freezing. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT) 

A row of snow plows make their way through Times Square during a snow storm in the early morning hours in the Manhattan borough of New York, February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

MacKenzie Perkins kicks through her recently built snowman in a park during blizzard conditions in Chicago, Illinois February 1, 2015. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT) 

Groundhog Staten Island Chuck is seen in his viewing unit, a box with clear plastic sides and fake turf, during a Groundhog Day weather prediction event at the Staten Island Zoo in New York February 2, 2015. Legend has it that if the groundhog sees his shadow, North America will experience six more weeks of winter and if he does not, spring will come early. Despite the shadows cast by the strong halogen lights pointing at the groundhog, Staten Island Chuck appeared to have a favourable prediction, and New York Mayor Bill de Blasio announced that spring is coming. REUTERS/Stephanie Keith (UNITED STATES - Tags: ENVIRONMENT SOCIETY ANIMALS TPX IMAGES OF THE DAY) 

A man braces against the cold during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT) 

A tugboat pushes a barge south on the Hudson River as the snow-covered Hook Mountain and village of Upper Nyack are seen in the background during a snowstorm in New York February 2, 2015. The huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Mike Segar (UNITED STATES - Tags: ENVIRONMENT MARITIME) 

A morning commuter carries an umbrella as she passes by the New York Stock Exchange during a winter storm in New York February 2, 2015. The northeastern United States braced for the second major snow storm in a week on Monday after a huge winter system dumped more than a foot (30 cm) of snow in the Chicago area, closing schools from the Midwest to New England. REUTERS/Brendan McDermid (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A Metropolitan Transportation Authority (MTA) Metro North Railroad commuter train travels north along the east shore of the Hudson River over snow-covered tracks past Sleepy Hollow, New York, February 2, 2015. A huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Mike Segar (UNITED STATES - Tags: TRANSPORT ENVIRONMENT) 

A man walks in falling snow and sleet down Main street in the New York City suburb of Nyack, New York, February 2, 2015. The northeastern United States braced for the second major snow storm in a week on Monday after a huge winter system dumped more than a foot (30 cm) of snow in the Chicago area, closing schools from the Midwest to New England. REUTERS/Mike Segar (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A police officer during a snow storm in the early morning hours in Times Square, in the Manhattan borough of New York, February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A worker is reflected in the sculpture "Cloud Gate" as he pushes a snow plough to clear a path during blizzard conditions in Chicago, Illinois, February 1, 2015. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT) 

A wooden Heart decoration hangs on a snow covered gate to a home in the New York City suburb of South Nyack, New York, February 2, 2015. The northeastern United States braced for the second major snow storm in a week on Monday after a huge winter system dumped more than a foot (30 cm) of snow in the Chicago area, closing schools from the Midwest to New England. REUTERS/Mike Segar (UNITED STATES - Tags: ENVIRONMENT SOCIETY) 

A bus with chains on it tyres makes its way though Times Square, during a snow storm in the early morning hours in the Manhattan borough of New York, February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENVIRONMENT TRANSPORT) 

Two men walk past the Crown Fountain in blizzard conditions in Chicago, Illinois February 1, 2015. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT TPX IMAGES OF THE DAY) 

A woman with bright yellow boots walks though puddle of slush in Times Square during a winter storm in the early morning hours in the Manhattan borough of New York February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

Rich Klavan shovels snow on a sidewalk in the Chicago suburb of Evanston, Illinois, February 2, 2015. A huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week, after leaving more than a foot (30 cm) of snow in the Chicago area. The area was hit with blizzard conditions yesterday and the temperature dropped to well below freezing. REUTERS/Jim Young (UNITED STATES - Tags: ENVIRONMENT) 

A man rides his bike down Washington Street during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT) 

A snow plow makes its way through Times Square during a snow storm in the early morning hours, in the Manhattan borough of New York, February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENVIRONMENT) 

Snow falls on statues during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT) 

A woman struggles with her umbrella in Times Square during a winter storm in the early morning hours in the Manhattan borough of New York February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT TPX IMAGES OF THE DAY) 

A worker clears the sidewalk on Washington Street during a snow storm in Boston, Massachusetts February 2, 2015. Boston, already buried under two feet (60 cm) of snow from a blizzard last week, was predicted to see a foot of snow after a huge winter storm hit the northeastern United States on Monday, the region's second snowy blast in less than a week. REUTERS/Dominick Reuter (UNITED STATES - Tags: ENVIRONMENT) 

A worker runs though a puddle of slush to a taxi he hailed in Times Square during a winter storm in the early morning hours in the Manhattan borough of New York February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A worker with Tappan Zee Constructors LLC, the designers and builders of the The 3.1-mile twin span cable-stayed bridge across the Hudson River, the largest bridge construction project in New York's history and the largest highway infrastructure project in North America, stands with his shovel on his back as he and other workers clear snow from the first section of the New bridge in South Nyack, New York, February 2, 2015. The northeastern United States braced for the second major snow storm in a week on Monday after a huge winter system dumped more than a foot (30 cm) of snow in the Chicago area, closing schools from the Midwest to New England. REUTERS/Mike Segar (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

A snow plow makes its way through Times Square in the early morning hours in the Manhattan borough of New York, February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT) 

Workers shovel away a large puddle of slush in Times Square during a winter storm in the early morning hours in the Manhattan borough of New York February 2, 2015. REUTERS/Carlo Allegri (UNITED STATES - Tags: SOCIETY ENVIRONMENT)