San Diego County Braces for Midweek Extreme Heat Warning

The National Weather Service issued an extreme heat warning for San Diego County’s coast, inland valleys and deserts through 8 p.m. Wednesday, with temperatures about 10-15 degrees above average; a heat advisory continues through Thursday for the mountains. Humidity remains high from monsoonal moisture and warm ocean temperatures, keeping conditions muggy even as relief isn’t expected until next weekend. Coastal beaches face a coastal flood advisory and high surf advisory through 11 p.m. Tuesday, with 6-7 foot swells and possible rip currents. Residents are urged to hydrate, shelter indoors, avoid leaving people or pets in cars, and use local cooling centers across the county.