Riders line up under heavy rain during the California Motorcyclist Safety Program (CMSP) training course on Sunday, Feb. 4, 2024, in Glendale, Calif. The second of back-to-back atmospheric rivers battered California on Sunday, flooding roadways and knocking out power to hundreds of thousands and prompting a rare warning for hurricane-force winds as the state braced for what could be days of heavy rains. (AP Photo/Damian Dovarganes)