The Los Angeles area continues to receive "beneficial rain" as an atmospheric river lingers over the region. Another storm is expected to develop next week.

The first of two "pineapple express" storms arrived in Southern California early Wednesday after delivering a stronger-than-expected pounding to the San Francisco Bay Area, breaking rainfall records.

The upcoming storm is likely to pose a higher risk for mudslides, debris flows and flooding than the rainfall this past week.

Two distinct systems will bring widespread light to moderate rain to Southern California: one on Tuesday into Wednesday and another Thursday and Friday.

A Pineapple Express forms when the jet stream dips south into the tropical Pacific near Hawaii, scooping up warm, moist air and carrying it northeast across the ocean. Named for Hawaii's famous fruit and the storm's origins near the islands, these powerful systems can dump the equivalent of 10 to 15 inches of rain over two to three days.

LOS ANGELES (AP) — More rain fell Monday on parts of Southern California after causing mudflows over the weekend, helping firefighters but boosting the risk of toxic ash runoff in areas scorched by Los Angeles-area wildfires.