Extreme heat and weather conditions are affecting various regions across the United States. San Diego County is under a heat advisory until Wednesday night, with temperatures potentially reaching 116 degrees in the deserts combined with thunderstorms increasing the fire risk. The Pacific Northwest, including Spokane and Seattle, is experiencing record-breaking heat, with Spokane hitting one of its hottest days at 107 degrees and Seattle maintaining a streak of 80 degrees or higher for 16 consecutive days. Central and Eastern Washington face an excessive heat warning with temperatures expected to reach up to 110 degrees. Meanwhile, Southeast Texas braces for heavy rainfall and potential flash flooding as remnants of Hurricane Beryl complicate storm drainage.