A prolonged, multi-day heat wave will bring hotter-than-normal conditions across interior Bay Area locations, with Antioch near 101, Livermore 99, Concord 98, Morgan Hill 97 and San Jose 91. Coastal zones will be milder but still above typical temperatures, with Richmond around 84, San Mateo 80, Oakland 79 and San Francisco 71. The National Weather Service issued and extended a heat advisory covering East Bay, South Bay, North Bay mountains, and interior Monterey and San Benito counties, with advisory end times varying by subregion. Monsoonal moisture and high clouds could raise humidity late week, and earlier long-term models had suggested even higher potential temperatures.
The temperatures still are going to be hotter for a longer stretch than they've been at any point since the summer solstice. They are expected to rise to 101 in Antioch, 99 in Livermore and 98 in Concord, generally the three hottest places in the interior East Bay. In the South Bay, the thermometer is expected to reach 97 in Morgan Hill and 91 in San Jose.
Those figures led the NWS to issue the region a heat advisory for the first time this summer. "By this time last year, we'd already had 23 summer days under a heat advisory, and most of those turned into a warning," Flynn said. "So this year, 100 degrees is going to feel a lot different. It's going to feel a lot hotter. People need to be aware of that and be careful."
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