Southern California is bracing for its hottest week of the year, with forecasters warning that a major late-August heat wave will send temperatures soaring across the region. The National Weather Service says widespread temperatures could run as high as 6 to 12 degrees above average, with the most intense heat expected from Tuesday through Friday. An Extreme Heat Watch is already in effect for much of the Los Angeles area beginning Tuesday morning.
The timing is notable after an already unusually hot summer. Forecasters say temperatures will climb sharply through the middle of the week, making this more than a typical Southern California warm spell.
Inland SoCal could see triple-digit heat
The National Weather Service is warning of temperatures between 100 and 110 degrees in areas roughly five to 10 miles inland from the coast. The San Fernando Valley could see some of the most extreme conditions, with forecasters estimating a 30% to 40% chance of reaching at least 110 degrees between Sunday and Wednesday. Los Angeles also faces a significant chance of reaching 100 degrees. Based on the current NWS forecast, “we are on track to tie or break 8 high temperature records in L.A. and Ventura Counties”.
The Antelope Valley and Santa Clarita Valley are also expected to see triple-digit heat for several consecutive days, while desert communities like Palm Springs could climb as high as 115 degrees. Even coastal areas won’t fully escape it. Beach communities are forecast to stay relatively milder, generally in the 80s, though some spots could edge into the low 90s during the hottest afternoons.
Why is SoCal getting so hot?
The heat is being driven by a strong area of high pressure, which encourages sinking air and warming temperatures near the surface. As the system strengthens, the combination of clear skies, intense August sunshine and limited cooling will allow temperatures to rise rapidly during the afternoon.
The National Weather Service is warning of a high risk for heat illness for much of the region. Officials are urging residents to stay hydrated, limit strenuous outdoor activity during the hottest hours and make sure children, older adults and pets have access to a cool environment. Relief may arrive toward the weekend, but for now, Southern California is officially in heat-wave mode.
