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    • California’s heat wave could break San Francisco fall records
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    California’s heat wave could break San Francisco fall records

    Bronwen Cerys Posted on

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    Meteorologists warn that unusually hot temperatures will dominate California this week as part of an early fall heat wave that may last into the weekend.

    More than 6 million people in the western United States are under a heat warning and watch this week, according to forecasts from the National Weather Service

    Along the California coast and the southwestern United States, a heat dome could cause temperatures to reach seasonal high records, AccuWeather meteorologists say. San Francisco, known for having temperate weather most of the year, could see a heat spike in the mid-90s as a high-pressure system traps heat over a portion of the western United States

    “It’s unusual for temperatures to be this warm this late in the year, so you see these records are in jeopardy,” Ashton Robinson Cook, a meteorologist with the National Weather Service, told USA TODAY.

    Sea breezes along California that normally bring cooler weather will not reach the coast this week, Robinson Cook said, because the high pressure system, or heat dome, is pushing temperatures up so much. Instead of blowing onshore, the sea breeze is kept away from the coast, he said.

    “It won’t come from the sea at all,” Robinson Cook said, explaining how the heat dome will prevent inland flow.

    Residents of cities like Los Angeles, Las Vegas and Phoenix will likely feel unusually hot temperatures through Friday, Robinson Cook warned, and possibly even into Sunday.

    Heat records could be broken in California

    A wide swath of the California coast, including San Francisco, was under a heat advisory Monday, warning of high temperatures of up to 35 degrees Fahrenheit. Just inland from the Bay Area, heat could rise to 105 degrees, the National Weather Service said Monday.

    According to AccuWeather, San Francisco’s heat record for this time of year was set in 1980 when temperatures reached 97 degrees Fahrenheit.

    Further north, Robinson Cook identified Ukiah, California, as another city that could break heat records. Later this week, Robinson Cook said Ukiah could reach 103 degrees, surpassing its record of 102.

    Los Angeles is under an excessive heat watch

    Temperatures will be scorching hot in Southern California, where Los Angeles is under an excessive heat watch through Wednesday evening and authorities are warning of temperatures as high as 103 degrees Fahrenheit.

    This week’s heat dome is “established over the California area and extends into the desert southwest,” Robinson Cook said.

    In California’s largest city, the weather service is warning of heat-related health risks and warning residents to stay out of the sun.

    “Everyone is at high risk of dangerous heat illness, especially the very young, the very old, those without air conditioning and those who exercise outdoors,” the weather service said Monday.

    Like further north, smaller cities in the greater Los Angeles area could break historic heat records this week, Robinson Cook said.

    In the desert town of Palmdale, north of Los Angeles, temperatures could reach 102 degrees Fahrenheit this week, he said, breaking the city record of 99 degrees. In Needles, along the Arizona border, temperatures could reach 109 degrees, breaking the city record of 108.

    “Las Vegas should break a record”

    Both Las Vegas and Phoenix could break heat records in early October.

    Even in Las Vegas, known for dry and hot weather, extreme heat this late in the year can be particularly damaging, the weather service said Monday.

    “Late season heat is dangerous because people are exhausted from battling the heat throughout the summer,” the weather service said.

    Heat in Phoenix could rise to 113 degrees Fahrenheit, breaking the record of 107 set in 2020, according to AccuWeather.

    AccuWeather meteorologists predict temperatures in Las Vegas could rise to 104 degrees Fahrenheit, breaking the record of 103 set in 1978, the source said. The weather service expects the outlook to be even hotter: temperatures could reach up to 108 degrees Fahrenheit in the greater Las Vegas area.

    “Las Vegas should break a record,” Robinson Cook said.

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    Bronwen Cerys
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