Southern California is preparing for a major storm expected to bring record-setting rainfall, with risks of flooding, mudslides, and even tornadoes. Forecasters warn that this multi-day atmospheric river could lead to significant flash flood threats, prompting evacuation warnings in various counties, including Los Angeles and Ventura. The storm will begin impacting the region soon, with officials urging residents to take precautions against potential debris flows, especially in burn-scarred areas. As the rain continues throughout the weekend, experts predict several inches of rainfall, raising concerns over safety and infrastructure.