NWS Forecast Office Los Angeles, CA

High pressure will build into California from the desert Southwest through the weekend. Hot temperatures will spread from the Antelope Valley across the mountains and inland valleys of southwest California for Saturday and Sunday. Temperatures will peak above 100 degrees for many areas each day. In addition, many foothill communities will not cool down much at night with low temperatures remaining the upper 70s to lower 80s, especially Saturday night. Coastal areas will remain the coolest overall, but afternoon highs will reach into the 80s. Cooler, onshore winds will help lower the temperatures several degrees for Monday. Heat advisories will be in effect for many of the coastal and inland valleys as well as the mountains from San Luis Obispo County to Los Angeles County over the weekend. A heat watch could be upgraded to an excessive heat warning for the Antelope Valley mainly on Sunday. The heat will increase the risk of heat-related illnesses, especially for sensitive populations like the elderly, the very young, and those without access to air conditioning. If you plan on being outside, limit outdoor activities during the hottest part of the day and wear loose-fitting, light-colored clothing. Remember to drink plenty of water and never leave children or pets in a hot car!