CHICAGO — Illinois cities are experiencing record-breaking cold.
The National Weather Service in Chicago says record low temperatures were set Tuesday morning at both Chicago and Rockford.
It says Chicago had a low of 7 degrees, which breaks the previous record of 8 set in 1986. It says Rockford had a low of 3 degrees, which breaks the previous record of 7, also set in 1986.
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The weather service says an "arctic airmass" that started in Siberia has been spilling over a large part of the Midwest. It says more records could tumble Wednesday.