Two cross-country storms are expected to bring rain to millions across more than 30 states beginning Thursday, packing a severe weather threat for the Deep South and the potential for snow from the higher elevations of the Four Corners through the Central Plains and Upper Midwest.

Precipitation will roll in for the first of two back-to-back storms Thursday evening as pure rain. This first storm will arrive out of the south, bringing warmer air along, keeping precipitation as rain into Friday morning. There is a slight chance of some mixing of rain and snow, but overall trends are keeping temperatures above freezing.

Communities across Southern California are cleaning up after several days of showers across the region. Evacuation warnings were in place for neighborhoods across Los Angeles County, primarily in areas surrounding recent burn scars -- including in Altadena around the Eaton Fire burn scar.

Michigan, bringing a combination of heavy rain, damaging winds, and accumulating snow from today into Monday, followed by a stretch of seasonably cold weather.

Those projected rainfall totals compare to the amount recorded during the first 48 hours of last week’s Christmas Eve storm where LA County got 2 to 10 inches, Orange County received 1 to 5 inches and the Inland Empire got 0.64 to 12.32 inches.

Heavy rain triggers flooding across the Southland, closing Santa Barbara Airport. While the Bay Area faces King Tide flooding, Southern California braces for debris flows in burn scarred areas.

Despite the latest storm system being less severe than last week’s, the ground and roads are already saturated. That means there's still a risk of mudslides, rock slides and other hazards, officials warned. A stretch of Topanga Canyon Boulevard was closed.

Heavy rain and flash flooding already led to water rescues and at least one death in Northern California, local officials said. Shasta County Sheriff Michael L. Johnson on Monday declared a state of emergency to prepare for more rain and allow the state to help with hazard mitigation and search and rescue operations.