Climate Changed

Dangerous Cold Snaps Feel Even Worse Because They’re Now So Rare

A half-century of U.S. temperature data suggests that frequent wintry blasts went out with parachute pants.

Polar Vortex Stops the Mail and Pizza Delivery in Midwest

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The alarming incursion of Arctic air this week betrays a difficult-to-perceive change in how U.S. winters unfold: It’s this cold much less often, which makes the freeze bite much more deeply.

In other words, people may forget how frequently the cold used to come.