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King tides return to Southern California coastlines Thursday and Friday, reaching heights 1 to 2 feet higher than normal ocean swells.

The National Weather Service warns of hazardous swimming conditions, powerful rip currents and waves up to 7.8 feet in some areas through Saturday.

Scientists and coastal planners are using these extreme tides to study future sea level rise and identify vulnerable communities for infrastructure planning.

Coast-side Southern Californians can expect the return of perigean spring tides — more commonly known as king tides — on Thursday. These exceptionally high tides occur when he sun, moon and earth align, increasing the gravitational pull on the ocea

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