Tracking a very cold start to what will continue to be a cold day. Temperatures will gradually warm up through the weekend.
Sam Imel via CNN
WJLA via CNN
WRTV via CNN
CNN;GETTY;APPLE via CNN
WBBM;Dwayne Reed/Teacher;Ty Gotham via CNN
SKY TG 24; Facebook/Emiliano Grillotti/ RietiLife; Vigili Del Fuoco; Polizia di Stato; Via WhatsApp/Francesco; Rai 24 News via CNN
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