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

An increasingly ferocious and volatile surf is raising questions about the future of the state’s piers, which have defined the coastline for generations.

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.

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, which propelled three people into the Pacific Ocean.