ginger? >> reporter: hey, david. you are right in the center of this block of freeze alerts that stretch from texas all the way to north carolina. the next couple of mornings are going to be severely cold. so, anywhere from houston, which tomorrow morning will feel like 23, to birmingham, alabama, it will feel like 17. and the wind chills obviously much worse in chicago, 7 below there. but the single digits make it all the way from philadelphia to boston by wednesday morning. david? >> ginger zee with us tonight. ginger, thank you. we're going to have much more on these deadly tornadoes in a moment here. but we do turn to the other news on this monday night, and to the outpouring of grief after the death of actor luke perry, days after suffering a massive stroke. known for his roles on "beverly hills 90210" and more recently on "riverdale," tonight, he is being remembered as a colleague, a friend, and he was so young. just 52. here's abc's chief national correspondent matt gutman tonight. >> reporter: with that squint and those iconic sideburns, luke perry defined cool for a generation of teens. >> i'm not in a good mood today. in fact, i'm feeling a little hostile.