(CNN)For much of the U.S., stepping into a walk-in freezer will be a lot more comfortable than going outside. From Minnesota to Texas, another blast of frigid weather is walloping the country. Here's what to expect: Wind chills will plunge to about  minus 40 Sunday in parts of North Dakota and Minnesota as another Arctic blast barrels through, CNN meteorologist Derek Van Dam said. As the work week starts, other cities will endure the mind-numbing freeze. Chicago's wind chill will be 20 below zero on Monday. And on Tuesday morning, Boston will suffer a wind chill of  minus 20, while New York and Philadelphia will grapple with wind chills of  minus 4.
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Even Dallas could get 2 inches of sleet
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About a dozen hypothermia-related deaths have been reported in the past week
More than 600 flights into, out of or within the @placeholder have been canceled, according to flightaware.com.