In pictures: Arctic blast sweeps U.S. northeast

Sea smoke on the ocean surrounds the Straitsmouth Island Light Station as an Arctic Front brings bitterly cold weather in Rockport, Massachusetts, February 4.     REUTERS/Brian Snyder

People walk during cold temperature and high winds in Manhattan, as deep cold spread across the northeast United States in New York City, February 4. REUTERS/Jeenah Moon

A view from the top of the observatory tower at Mount Washington State Park, where the wind chill dropped to 105 degrees below zero Fahrenheit (-79 Celsius) in New Hampshire, February 4.  Mount Washington Observatory/mountwashington.org

People take a selfie in front of a mostly frozen Bryant Park fountain during cold temperature and high winds in Manhattan, February 4. REUTERS/Jeenah Moon

A woman walks in bitterly cold temperatures and high winds in Brooklyn as deep cold spread across the northeast United States, February 3. REUTERS/Caitlin Ochs

Sea smoke on the ocean surrounds the Straitsmouth Island Light Station as an Arctic Front brings bitterly cold weather in Rockport, Massachusetts, February 4.     REUTERS/Brian Snyder

A homeless sleeps inside a store during cold temperature and high winds in Manhattan, February 4. REUTERS/Jeenah Moon

Hats, scarves, mittens, and gloves are pictured hanging on a fence for people who are experiencing homelessness to grab as a cold Arctic Front hits in Boston, February 3.     REUTERS/Brian Snyder

Sea smoke rolls off the ocean as an Arctic Front brings bitterly cold weather in Rockport, Massachusetts, February 4.     REUTERS/Brian Snyder

People walk during cold temperature and high winds in Manhattan, as deep cold spread across the northeast United States in New York City, February 4. REUTERS/Jeenah Moon