Floods, power outages as 'Pineapple Express' pounds California

California grapples with a potent atmospheric river, causing widespread flooding, power disruptions, and hurricane-force winds. The state faces the risk of mud and debris flows, fatalities, and serious injuries. Tornadoes are a rare possibility. Transportation is affected, with significant delays and advisories against mountain travel. The storm, known as a "Pineapple Express," necessitates a hurricane-force wind warning.