in the fog of that falling precip drivers struggled to find their way as you might imagine. more than 30 cars from suvs to semi trailers were left manage geled. they are saying now that survivors are talking about it they suddenly couldn t see out of their car windows and couldn t stop because the roadway was so slick. a tough scene for first-responders to handle. they shut down that stretch of i-75 for hours while they helped out the victims and removed the wreckage. parts of michigan are under a winter warning. they re expecting two fight of lake-effect snow today and tomorrow. back to you. jenna: scary if you have to be out there driving. if you do, a good warning to be careful out there. harris . reporter: chains. jenna: good advice. that s for sure. thanks, harris. jon: just into the fox newsroom comes word that the controversial secretary of energy, stephen chu announced he will be leaving his post once a successor is named. pretty common for