The National Weather Service issued high surf advisories Thursday morning for Northern California, with 20-to-30-foot waves expected through Sunday.

A powerful storm pummeling the West Coast churned up waves as high as 60 feet, killing one man, sweeping another out to sea and prompting multiple rescues when a pier collapsed in Santa Cruz, California,

Persistent high surf and flooding threats along California's coast have residents on high alert a day after a major storm was blamed for one man's death and the partial collapse of a pier.

Three people were rescued from the wharf. The powerful surf also fatally trapped a man under debris on a beach in Santa Cruz, the authorities said.