
ALT Graphic showing forecast high temperatures in Southern California on Saturday, August 1, 2026. Temperatures up to 101°F are expected in the inland valleys of San Diego County, and up to 107°F in the Inland Empire. Temperatures up to 119°F are possible in the lower deserts this weekend.

ALT Graphic showing forecast HeatRisk in Southern California on Saturday, August 1, 2026. Widespread moderate HeatRisk is expected for all areas east of the immediate coast and major HeatRisk is expected in parts of the Inland Empire and deserts. Locally extreme HeatRisk possible locally in the deserts where nighttime temperatures remain very hot. Moderate to major risk for heat-related illnesses for pets, livestock, and much of the population, especially with extended outdoor exposure, and for those who are heat sensitive and/or without effective cooling and/or adequate hydration.



























