An historic January storm dumped more deep snow along the U.S. Gulf Coast on Wednesday after bringing Houston and New Orleans to a near standstill over the past two days and burying parts of Florida's Panhandle with accumulations more typical of Chicago.

North Florida residents from Pensacola to Jacksonville are bracing for what is expected to be a historic, once-in-a-lifetime winter storm.

The heavy snow, sleet and freezing rain hitting parts of the Deep South came as a blast of Arctic air plunged much of the Midwest and the eastern US into a deep freeze.