Deadly winter weather is expanding its grip across much of the nation.
Snow, ice and frosty temperatures have plagued the midwest, the northeast and the deep south.
Record lows have already been recorded in several states. It was just seven degrees Tuesday morning at Chicago's O'Hare Airport.
In some areas, the storm is creating white-out conditions. At least four fatal accidents have been blamed on the weather so far.
Some of the coldest and most severe conditions are expected over the next 24 hours.
