Before-and-after footage shows how an atmospheric river transformed the Los Angeles River, sending water surging through the channel after torrential rain soaked Southern California. | AccuWeather

A month's worth of rain fell in San Diego within hours on New Year's Day, flooding streets and making it one of the top 15 wettest days on record in the city. | AccuWeather

A powerful storm lashing the state of California is causing possible life-threatening flooding and debris flows, with some areas seeing more than 6 inches of rain. Read more: https://cnn.it/3MRQkJe | CNN