After days of above-normal heat, a low-pressure system moved into the Southland Monday, bringing driving rain to some areas along with booming thunder and lightning strikes that prompted the closure of beaches in Los Angeles and Orange counties.
The National Weather Service initially warned of a band of storms moving over the ocean toward Catalina Island. But by late afternoon, clouds darkened the skies over much of the Southland.
Storms began dropping heavy rain near the Los Angeles/Long Beach port complex, spreading inland.
The storm carried with it thunder and lightning that first prompted beach-closure warnings in parts of Orange County. Los Angeles County lifeguards closed all beaches from San Pedro to Malibu, along with Catalina Island, around 4:30 p.m. due to the weather.
NWS forecasters said the chance of thunderstorms would continue through late Monday night.