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MIAMI (CBSMiami) —  An arctic blast is gripping folks in the East Coast.

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From Maryland to Maine, record-breaking freezing temperatures are on tap into the weekend after the region was slammed with heavy snow, hurricane-force winds and coastal flooding.

As Massachusetts heads into a deep freeze, helicopters got a look at seawalls near Boston that were no match for a powerful high tide during a massive snowstorm.

“I think what surprised us is that it was all the way up the coast and the worst high tide they’ve ever had,” said Gov. Charlie Baker (R-MA).

Federal forecasters say it was a super moon-driven tide that broke a record set by the blizzard of ’78.

In Revere, cars were frozen in place.

Icy water from the harbor poured into the streets of Boston.

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The aquarium subway stop in Boston was literally underwater when the Boston harbor flooded the streets and shut down subway service for hours.

Forecasters say it’s about to get even colder.

Temperatures will feel as low as minus 35 in some parts of the Northeast.

Freeze warnings extend down to Florida where airplanes are being de-iced.

Wind chill advisories and warnings are posted from the Carolinas to Maine and then west to North Dakota.

In New Jersey, firefighters braved the bitter cold to battle a 5-building blaze and rescued several residents.

The water used to put out the fire WAS frozen and likely won’t melt for days.

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So far, 21 deaths are blamed on the weather.