Triple-Digit Heat and Flash Flood Watches Are in Tuesday's SoCal Forecast - NBC Southern California

Triple-Digit Heat and Flash Flood Watches Are in Tuesday's SoCal Forecast

Relief is in the weekend forecast, but muggy conditions will have SoCal simmering until then

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    NEWSLETTERS

    First Alert Forecast: Flash Flood Watches

    Triple-digit heat and flash flood watches are in the forecast. Shanna Mendiola has the forecast for Tuesday Sept. 3, 2019. (Published Tuesday, Sept. 3, 2019)

    High temperatures in the high 90s and low 100s were forecast in Southern California Tuesday, when thunderstorms, heavy rain and flash floods are possible in wildfire burn areas.

    Los Angeles County health officials issued a high heat advisory for this week, warning of 100-degree temperatures in the Santa Clarita Valley, east San Gabriel Valley and west San Fernando Valley.

    "When temperatures are high, even a few hours of exertion may cause severe dehydration, heat cramps, heat exhaustion and heat stroke," said Dr. Muntu Davis, Los Angeles County's chief health officer. "While it is very important that everyone take special care of themselves, it is equally important that we reach out and check on others, in particular those who are especially vulnerable to the harmful effects of high temperatures, including children, the elderly, and their pets."

    Officials also warned people not to leave pets outside in the sun, or in cars.

    "It's still going to feel muggy outside," said NBC4 forecaster Shanna Mendiola. "A 92-degree day today here in LA is going to feel more like 95, 96. It's sticking around through Thursday."

    A flash flood was issued watch for the San Gabriel Mountains in LA and Ventura counties and the Antelope Valley. The watch, meaning conditions are favorable for flash flooding, is effective from noon through mid evening.

    Expect partly cloudy skies in LA County Tuesday with highs of 82 at LAX; 83 on Mount Wilson; 85 in Avalon; 89 in Downtown L.A.; 92 in Long Beach; 93 in San Gabriel and Burbank; 97 in Pasadena; 98 in Saugus; 100 in Palmdale; 101 in Woodland Hills; and 102 in Lancaster. Temperatures will decline slightly beginning Friday.

    Sunny skies were forecast in Orange County, along with highs of 79 in San Clemente; 80 in Newport Beach and Laguna Beach; 88 on Ortega Highway at 2,600 feet; 92 in Fullerton; 93 in Irvine; and 94 in Anaheim, Mission Viejo, Fremont Canyon and Trabuco Canyon. A slow cooldown will start Friday.

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