Arctic Blast Grips Parts Of the U.S., With Snow And Record-Breaking Cold

A worker shovels snow from a sidewalk n the Humboldt Park neighborhood of Chicago. Forecasters expect temperatures to drop around 10 degrees by Wednesday.

Forecasters say an estimated 300 cold weather records are expected to be tied or broken through Wednesday. The “arctic outbreak” is being blamed for four deaths so far.

(Image credit: Scott Olson/Getty Images)