Some pop-up showers and thunderstorms are possible on Saturday but there is no organized threat of flash flooding on Saturday as tropical moisture begins to thin out.

Millions of residents face heightened flood risks, as intensified storm activity threatens vulnerable communities with flash flooding.

The boy was with his father when the vehicle was washed away Thursday along historic Route 66 in Barstow. The father was found alive.

A driver made a daring, and ultimately unsuccessful attempt to save his truck from an oncoming wall of water and mud as flash flooding fueled by the remnants of Tropical Storm Mario slammed Southern California Thursday.

Residents across Southern California should prepare for a mix of showers, isolated thunderstorms and strong winds through Friday, Sept. 18.

Xavier Padilla Aguilera was traveling with his father, Brandon Padilla Aguilera, 26, when their vehicle was swept off a main road in Barstow, California, about 115 miles northeast of Los Angeles, by rushing flood waters around 7:14 p.m., according to Barstow Police.

Heavy rains have caused flash floods to occur in certain areas of the Kern County desert on Thursday.The rain is from remnants of Tropical Storm Mario and will run through central to southern California through Friday,