Southern California is bracing for life-threatening flood risks as a slow-moving upper-level low along the California coast funnels deep Pacific moisture into the region. Rainfall totals are expected to range from 2 to 5 inches across Southern California, with the Transverse Ranges potentially receiving over 6 inches. This heavy rainfall significantly elevates the risk of flash flooding and debris flows, particularly in areas previously impacted by wildfires, such as burn scar regions within Santa Barbara, Ventura, and Los Angeles Counties.