Photos: Storm slams Northern California with flooding and debris flows, heads toward SoCal

A massive storm barreled toward Southern California on Monday after flooding highways, toppling trees and causing rock slides and mudflows in areas burned bare by wildfires across the northern half of the state.

Drenching rains and strong winds accompanied the weekend arrival of an atmospheric river — a long plume of Pacific moisture — into the drought-stricken state.

Snow falls on Mammoth Mountain on Monday in Mammoth Lakes, Calif.

(Christian Pondella/Mammoth Mountain Ski Area )

Houseboats float on Lake Oroville. Recent storms raised the reservoir more than 16 feet, according to the California Department of Water Resources.

(Noah Berger/Associated Press)

Rocks and vegetation cover Highway 70 after a land collapse in the Dixie fire zone in Plumas County.

(Noah Berger/Associated Press)

A “road closed� sign floats on a flooded street Sunday in San Rafael. A Category 5 atmospheric river brought heavy precipitation, high winds and power outages to the San Francisco Bay Area.

(Justin Sullivan/Getty Images)

Workers try to divert water into drains as rain pours down Sunday in Marin City, Calif.

(Justin Sullivan/Getty Images)

A motorist surveys floodwaters Sunday from Lake Madrone crossing Oro Quincy Highway in Butte County. The area burned in 2020’s North Complex fire.

(Noah Berger/Associated Press)

Children play in floodwaters Sunday in Mill Valley, Calif.

(Ethan Swope/Associated Press)

A person bikes through floodwaters Sunday in Mill Valley, Calif.

(Ethan Swope/Associated Press)

Allison Chan and son Ian Dimaano pass a puddle Sunday as rain falls in Alameda.

(Anda Chu/Associated Press)

A pedestrian walks on a flooded street Sunday in Kentfield, Calif.

(Justin Sullivan/Getty Images)

Workers push water off a tarp covering the field from rain Sunday at Levi’s Stadium before an NFL football game between the San Francisco 49ers and the Indianapolis Colts in Santa Clara.

(Jed Jacobsohn/Associated Press)