Ice covers rocks on the waterfront in the borough of Brooklyn in New York on Thursday. (Peter Morgan / Associated Press)
Commuters leave the Casco Bay Ferry terminal after arriving in Portland, Maine, where the temperature at dawn on Thursday was minus 9 degrees. (Robert F. Bukaty / Associated Press)
The sun rises early Thursday over downtown Pittsburgh where the temperature was near zero. (Gene J. Puskar / Associated Press)
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A large wave off Lake Erie engulfs a lighthouse at the entrance to Cleveland Harbor on Wednesday. (Mark Duncan / Associated Press)
Bundled-up pedestrians make their in New York’s Times Square on Thursday. (Seth Wenig / Associated Press)
An icy Lake Erie hugs the shoreline west of downtown Cleveland on Thursday. (Mark Duncan / Associated Press)
Icicles form on a wooden fence at a horse farm on Thursday in Fort Walton Beach, Fla. Temperatures were expected to remain below freezing in northwest Florida on Thursday night. (Nick Tomecek / Associated Press)