Polar vortex brings life-threatening cold to US following severe winter storms

A polar vortex has brought extremely cold temperatures to several U.S. states, with the National Weather Service warning of "life-threatening" conditions. Chicago is experiencing single-digit temperatures, which are expected to continue throughout the week. This cold snap follows severe winter storms that caused intense flooding in Kentucky, Florida, and Georgia. Torrential rains led to significant flooding, affecting homes and roadways in these areas. In Southern California, heavy rain has raised concerns about flooding and landslides, particularly in regions recently impacted by wildfires. Officials are preparing for potential hazards as the storms continue.