* WHAT...High temperatures 97 to 102 and low temperatures 65 to 75 expected, with widespread Moderate HeatRisk and areas of Major HeatRisk.
* WHERE...The central and southern Sacramento Valley, northern San Joaquin Valley, Delta and Carquinez Strait, Foothills, and portions of the Coast Range.
* WHEN...From 10 AM Wednesday to 10 PM PDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses, especially to anyone without effective cooling and/or adequate hydration.
* ADDITIONAL DETAILS...Hottest temperatures and areas of Major HeatRisk are expected to occur on Thursday. Warmest overnight lows are expected in the Sierra foothills thermal belts.