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Southern California is sweltering under a dangerous heat wave that is expected to spread triple-digit temperatures through the Labor Day weekend — and officials are urging people to follow coronavirus safety rules as they seek relief at the beaches.

The National Weather Service is forecasting potentially record-breaking highs through Monday.

Cities in around the state have opened cooling centers, including in:

The state’s power grid says it doesn’t expect any blackouts, but it is asking people to conserve electricity from Saturday through Monday, between 3 p.m. and 9 p.m.

Los Angeles County is bracing for large crowds along its 72 miles of coastline, and campgrounds already are full in some mountain areas.