How is the polar vortex affecting the United States?

The polar vortex is causing extreme cold conditions across the United States, pushing temperatures down to dangerous levels that extend as far south as the Mexico border. More than 87 million people across 22 states are under extreme cold advisories, with temperatures plunging significantly below normal levels. In Fort Worth, Texas, temperatures have dropped to 19 degrees, with wind chills feeling as low as minus 2 degrees, creating hazardous conditions in a region unaccustomed to such extreme cold. This unusual weather pattern is expected to be temporary, with forecasts indicating a return to milder temperatures in the 70s by next week.