California is bracing for a heatwave as the National Weather Service has issued a heat advisory for several regions, including Los Angeles County, Ventura County, Santa Clarita Valley, San Fernando Valley, and San Gabriel Valley. The advisory is in effect from early Monday through Tuesday evening, with a potential extension into Wednesday, indicating prolonged exposure to high temperatures. Residents can expect daytime highs ranging from 96°F to 106°F, creating hazardous conditions, especially for vulnerable populations such as the elderly, children, and those with chronic health conditions. These high temperatures can lead to heat-related illnesses like heat stroke and heat exhaustion if precautions are not taken.