@CNN: It’s been so cold in Chicago that workers set fire to railroad tracks just to keep the trains moving. The extreme cold — around -22 F Wednesday morning — can cause rail defects. https://t.co/7NG3VKuPYV https://t.co/Bd15ZZUged

@CNN: It’s been so cold in Chicago that workers set fire to railroad tracks just to keep the trains moving. The extreme cold — around -22 F Wednesday morning — can cause rail defects. https://t.co/7NG3VKuPYV https://t.co/Bd15ZZUged