"Severe Storms Cause Widespread Flooding Across Southern U.S."

Nearly 100 million people are under dense fog advisories as downpours persist in the Southeast, leading to flash flooding and minor to moderate river flooding. The National Weather Service warns of life-threatening floods in the central Gulf Coast states and forecasts excessive rainfall in Mississippi and Louisiana, with flood warnings in effect for parts of Tennessee. Meanwhile, the western U.S. faces widespread low elevation rain and mountain snow due to a cold front.