Sweltering heat will plague much of California this week and increase snowmelt along the Sierra Nevada, forecasters said. Starting Thursday, a heat wave will grip the mountains, deserts, valleys and major cities for several days as temperatures soar into the 90s and 100s. Because temperatures will be 15 degrees above normal across the state, forecasters urged Californians to stay indoors and keep cool to prevent any heat-related illnesses. So far, the warm weather hasn’t triggered

any heat advisories or warnings. As the mercury climbs in Sacramento County, much of the area will remain dry, according to the National Weather Service in Sacramento. Temperatures could reach 105 in Redding and Marysville, and 104 in Chico, Stockton and Sacramento on Saturday. Along the Sierra Nevada, the weather has been a bit topsy-turvy. READ MORE