Thunderstorms and beach evacuation

Brady Webush, left, and Johnny Byrne, both from Manhattan Beach, end their day in the El Porto area of Manhattan Beach. Weather in Los Angeles brought morning showers to the beaches and thunderstorms to other parts of L.A. County.

(Jay L. Clendenin / Los Angeles Times)

Aug. 1, 2017 9:10 PM PT

A strong thunderstorm brought heavy rainfall to parts Southern California, prompting weather officials to issue a flash flood warning in the Antelope Valley in Los Angeles County. In Huntington Beach, officials evacuated the city beach during the U.S. Open of Surfing after lightning strikes were reported in the area, police said.

A rainbow over Thousand Oaks after a day of thunderstorms and high humidity hit the Southland.

(Al Seib / Los Angeles TImes)

People evacuate the beach, water and pier, including the U.S. Open of Surfing contest, as a thunderstorm with potential lighting approaches the area.

(Allen J. Schaben / Los Angeles Times)

Huntington Beach police evacuate the beach as well as the water and pier, including the U.S. Open of Surfing contest, as a thunderstorm with potential lighting approaches.

(Allen J. Schaben / Los Angeles Times)