A massive fire at the Chemtool plant in Rockton, Illinois, forced a mandatory evacuation of the area Monday morning. Connect with NBC 5 Chicago Online Visit nbcchicago.com : https://www.nbcchicago.com/ Facebook: https://www.facebook.com/nbcchicago/ Twitter: https://twitter.com/nbcchicago Instagram: https://www.instagram.com/nbcchicago/