Moderate Expected Likely Heat Advisory Heat Advisory issued August 5 at 3:57AM PDT until August 8 at 8:00PM PDT by NWS San Diego CA Aug 5, 3:57 AM → Aug 8, 8:00 PM WHAT: High temperatures in the mid 90s to 105 expected. WHERE: San Bernardino and Riverside County Valleys-The InlandEmpire. WHEN: Until 8 PM PDT Saturday. IMPACTS: Hot temperatures may cause heat illnesses. + Read More Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Updated: Aug 5, 5:02 AM Source: NWS Alert