behind this illinois pileup, with jack knifed semis blocking traffic for hours. nationwide, 5,000 flights cancelled today. in texas, subfreezing temps dishing out a major test for the state s power grid, crippled in last year s storm that left more than 200 people dead. we are dealing with one of the most significant icing events that we ve had in the state of texas in at least several decades. the texas electric grid is the most reliable and resilient that it has ever been. reporter: winterize plants and extra reserves are keeping it intact. ice eye build up is causing local outages for thousands. oh, no, not again. reporter: this man still has power for now. last year spent four days huddled in a sleeping bag with little food or water. where did last year s storm leave you? with a new mind-set to be prepared the next time. reporter: the real test comes