Extreme Heat Advisories Spread Across California, Nevada, Oregon Amid Wildfire Risks

A widespread and intense heat wave is impacting multiple regions across California, Nevada, and Oregon, prompting several heat advisories and extreme heat watches. Southern California faces excessive heat warnings and red flag wildfire alerts due to high temperatures reaching up to 102 degrees and dry, windy conditions, with coastal areas experiencing milder temperatures and mountain regions expecting thunderstorms. San Diego is under an Extreme Heat Watch with temperatures expected to exceed 115 degrees, leading city officials to establish Cool Zones for relief and emphasize precautions, especially for vulnerable populations and the homeless. Northern California counties such as Trinity, Lake, Mendocino, and Humboldt are experiencing abrupt triple-digit temperatures, with meteorologists warning that cooler preceding weather has left residents less acclimated to the heat. In Oregon's Siskiyou and Modoc counties, a heat advisory warns of dangerously hot temperatures up to 100 degrees, urging hydration, sun protection, and awareness of heat illness signs. Nevada, including Reno and surrounding areas, also faces heat advisories with highs near 98 degrees alongside thunderstorm chances, with officials recommending avoiding strenuous outdoor activities and staying hydrated.