Article Photos: State-by-state look at frigid blast hitting US 11/36

Before dawn and in -9 degree weather, Tom Tuning, right, greets men who wait for the opening of the St. Francis Center's day shelter, where Tuning is finance director, in downtown Denver, Thursday Dec. 5, 2013. A wintry storm pushing through the western half of the country has brought bitterly cold temperatures that prompted safety warnings for residents in the Rockies and threatened crops as far south as California. (AP Photo/Brennan Linsley)