Southern California is bracing for what could become the hottest and longest heat wave of the year. The National Weather Service says dangerous heat will build across the region, with triple-digit temperatures expected in many inland communities from today through next Monday. Forecast highs include 108 degrees in Lancaster, 106 in Canoga Park, 102 in Santa Clarita and 92 in downtown Los Angeles. Temperatures across the Inland Empire and the interior valleys of San Diego County are also expected to top 100 degrees, while desert communities could climb above 110. Forecasters say elevated humidity will make conditions feel even more uncomfortable and limit overnight cooling. Lows are expected to remain in the 70s across much of Los Angeles County, offering little relief after sunset. A heat advisory goes into effect at 10 a.m. Wednesday and remains in place until 8 p.m. Monday. Residents are urged to stay hydrated and avoid prolonged outdoor activity.
