A significant cold snap is set to grip much of the United States, with a polar vortex bringing dangerously low temperatures and rough winter weather. Millions are preparing for the first major winter storm of the season, which could lead to plummeting temperatures and heavy snowfall in various regions, including Texas and the eastern U.S. Meteorologists are sounding alarms about the potential impact of this arctic blast, predicting prolonged cold periods and challenging conditions. States are bracing for what could be the coldest weather in over a decade as the polar vortex descends, with frigid air expected to bring snow, sleet, and dangerous wind chills.