Moderate Expected Likely Heat Advisory Heat Advisory issued October 7 at 4:37AM PDT until October 9 at 10:00PM PDT by NWS Hanford CA Oct 7, 4:37 AM → Oct 9, 10:00 PM WHAT: High temperatures up to 101 degrees expected. Overnight lows between 70 and 75 degrees expected in the Sierra and Coastal Range Foothills where the thermal belt is strongest WHERE: San Joaquin Valley, Sierra Nevada foothills, and Coastal West Hills. WHEN: Until 10 PM PDT Friday. IMPACTS: Hot temperatures may cause heat illnesses. ADDITIONAL DETAILS: Moderate to major risk of heat-related illnesses for much of the population, especially those without effective cooling or hydration. + 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: Oct 7, 7:53 AM Source: NWS Alert