Polar Air Sweeps Into U.S. Bringing Snow and Ice

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A wave of polar air is sweeping into the U.S. with snow and ice, sending energy use soaring and threatening to damage crops and disrupt natural gas production.

Temperatures will plummet as the cold moves south, east and west from Canada. Readings in Chicago will tumble from today’s high of 57 degrees Fahrenheit (14 Celsius) to a low of 5 degrees next week, according to forecasts.