'Frost quakes' may be hitting Chicago as temperature drops to record-breaking lows
(CNN) -- The winter weather isn't done with Chicago; now there is talk of frost quakes.
CNN affiliate WGN reported Wednesday that viewers in the Chicago area were awakened by a series of booms.
"I thought I was crazy! I was up all night because I kept hearing it," viewer Chastity Clark Baker said on Facebook, the news station reported. "I was scared and thought it was the furnace. I kept walking through the house. I had everyone's jackets on the table in case we had to run out of ...