How severe is the cold weather affecting Dallas, Texas?

Dallas is experiencing extreme cold conditions with temperatures at 19 degrees and feel-like temperatures of just 2 degrees. CBS correspondent Omar Villafranca reports that the situation is so severe that Dallas is actually colder than Reykjavik, Iceland and Anchorage, Alaska. This polar vortex has created brutal winter conditions across southern states, leading to icy roads, school cancellations, and concerns about energy costs on Texas's unregulated power grid.