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https://npr.brightspotcdn.com/dims3/default/strip/false/crop/3634x2044+0+0/resize/1400/quality/100/format/jpeg/?url=http://npr-brightspot.s3.amazonaws.com/01/79/a8df14db4847b1aa569a0015631b/ap25008813018446.jpgBundle up and prepare: People living “basically anywhere from the Rockies eastward” will see extremely cold temperatures over the next several days, a meteorologist says.