...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT WEDNESDAY... * WHAT...Afternoon high temperatures up to 108 degrees expected. Heat Risk will range from Moderate to Major. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Wednesday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures up to 108 degrees will occur today until Wednesday. Overnight lows will range from the upper 60s in some valley locations to the lower 80s in some of the higher foothills. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. &&