The National Weather Service warns that hot conditions up to 100 degrees in the San Diego County Mountains and Valleys, and over 114 degrees in the San Diego County Deserts will be present today until Wednesday, 7/26/23, at 8 p.m. * Stay inside or in shaded areas. * Drink lots of water. * If you feel sick from the heat, call 9-1-1. * Never leave young children or pets alone in vehicles. Find a cool place to go and tips to beat the heat at www.coolzones.org. Visit the National Weather Service at www.weather.gov/sgx/ for more information, updates, and a map.