LOS ANGELES (AP) — A summer storm delivered rain, thunder and lightning to central and southern California on Saturday, leading to beach closures, flash floods and outages that left tens of thousands of people without power. The region received scattered shower — in some areas, downpours — as a tropical storm off Baja California pushes clouds and warm and muggy conditions northward. The unusual weather turned Los Angeles County's typically packed beaches into empty stretches of sand when the threat of lightning strikes forced authorities to close 70 miles of beaches.