A record-shattering freeze kept its grip on much of the eastern United States on Tuesday, causing at least eight deaths and closing schools as forecasters warned of a storm that could slam some areas with blizzard conditions later this week.

A mix of freezing rain, sleet and snow is forecast to fall in an area from northern Florida to South Carolina from Tuesday night, which could snarl transport.

Blizzards are possible across portions of eastern New England from late Thursday, where some areas could see 12 to 15 inches (30-38 cm) of snow, the National Weather Service (NWS) said, adding an arctic air mass will remain entrenched over the eastern two thirds of the country through the end of the week.

Late on Tuesday, Georgia Governor Nathan Deal declared a state of emergency for 28 counties after the National Weather Service issued the winter storm warning.

Boston tied a 100-year-old record on Tuesday when it marked seven consecutive days of temperatures that did not top 20 degrees Fahrenheit (-6.7 degrees Celsius). Up and down the coast, people working outdoors struggled with the frigid conditions.

In New York City, Nayarit Delgrado, who promotes Times Square's Madame Tussauds wax museum by handing out discount cards to tourists, said her secret to enduring long days outdoors was resisting the urge to check the temperature on her mobile phone.

"I just don't want to know," said the 40-year-old Bronx resident, who said she was bundled up in layers and tugged back a cuff at her wrist to reveal a rainbow of sleeves.

Officials urged people across the northeast to alert social services if they saw people in jeopardy because of the cold.

"We want every resident to have shelter and warmth," Washington Mayor Muriel Bowser said on Twitter.

The major winter storm is expected to bring snow, ice, rain, strong winds, and tidal flooding to coastal locations from the southeast to New England into Thursday, the NWS said adding, "hazardous travel is likely."

The weather service has issued a winter storm warning from northern Florida to North Carolina.