Moderate Expected Likely Heat Advisory Heat Advisory issued August 4 at 9:35PM PDT until August 8 at 8:00PM PDT by NWS San Diego CA Aug 4, 9:35 PM → Aug 8, 8:00 PM WHAT: High temperatures in the upper 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, 3:12 AM Source: NWS Alert