The extreme heat poses significant health risks, particularly for vulnerable populations such as the elderly, children, and those with pre-existing health conditions. Heat-related illnesses, including heat exhaustion and heat stroke, are expected to rise. Areas under the heat watch include San Bernardino and Riverside County Valleys, Santa Ana Mountains/Foothills, San Diego County Coastal Areas, San Diego County Inland Valleys, and Orange County. Residents in these regions should take precautions to avoid prolonged exposure to high temperatures and stay hydrated.