NWS Forecast Office San Diego, CA

High temperatures Saturday will be slightly warmer inland and for the coast compared to today. Slightly hotter for the low desert. Highs in the upper 70s to 80s for the coast and mountains, upper 80s to 90s for the inland valleys, 95 to 100 for the High Desert and 105 to 112 for the lower deserts. Expect locally dense AM fog in coastal region to reduce visibilities to less than 1 mile.

High temperatures slightly warmer inland and for the coast, slightly cooler for the deserts. Highs in the upper 70s to 80s for the coast and mountains, 90s for the inland valleys, 95 to 100 for the High Desert and 105 to 107 for the lower deserts.

An Excessive Heat Warning is in effect from 10 AM today through 8 PM on Saturday for the low desert. Groups sensitive to heat should prepare for unseasonably to dangerously hot temperatures through early next week.