Triple-threat storm bears down on central and southern US, disrupting Mardi Gras celebrations

More than 55 million people across the central and southern US are at risk of severe weather on Tuesday as a violent storm sweeps across the country, bringing the potential for blizzard conditions, tornadoes and fire weather.

​ More than 55 million people across the central and southern US are at risk of severe weather on Tuesday as a violent storm sweeps across the country, bringing the potential for blizzard conditions, tornadoes and fire weather. Read More Breaking News, Latest News and Videos | CNN