To keep them from freezing. while on the street, potholes proliferated. chicago transportation department deputy commissioner tom carney. >> for the calendar year 2014 we're at about 75,000 potholes filled already. >> reporter: 75,000 potholes? >> yes. >> reporter: 75,000 potholes, scott! and by comparison, for the hole month of january last year the city filled 55,000 potholes and, of course, there are four days left in january this year. >> pelley: and 400,000 chicago students staying home from school. dean, thanks very much. staying inside did not always provide relief today. here's jamie y...