A mudslide trapped several vehicles along Valley of the Falls Drive in Forest Falls in San Bernardino County, Calif., on Thursday, Nov. 29, 2018. Forecasters say the weather system that has been raining all day on Southern California has developed instability and may produce thunderstorms. Mud and rock slides have also closed two mountain highways northeast of Los Angeles. (Stan Lim/The Orange County Register via AP), APTOPIX