Bay Area heat wave could bring 107-degree high temperatures

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ByAlix Martichoux KGO logo
Sunday, September 27, 2020
AccuWeather forecast: Red Flag Warning takes effect at 9p.m., Spare the Air Alert tomorrow
A Red Flag Warning will go into effect at 9p.m. tonight for the North Bay, East Bay Hills and Inland East Bay as offshore winds develop. Tomorrow is a Spare the Air day due to the wildfire smoke, hot temperatures and smog.

SAN FRANCISCO (KGO) -- Here we go again, Bay Area. A grueling heat wave is heading into town, and this time it's going to stick around a while.

"You're really going to feel the heat starting Sunday," says ABC7 News meteorologist Drew Tuma. "That's when we're going to see a loss of the marine layer. We're going to see our hottest temperatures around 100 inland."

RELATED: Red Flag Warning issued for Bay Area: Here's where fire danger will be highest

Things only get hotter from there, says Tuma.

"I really feel like Monday is not only the peak of the heat wave, but that's when it really will encompass all of the Bay Area... even if you live on the coast or in the city, you're going to feel the heat Monday."

San Francisco will likely hit 90 degrees and the South Bay will see highs around 100.

"I expect some places to hit 106, 107 Monday -- easily," says Tuma.

Because of the heat, winds and critical fire danger, a Red Flag Warning will be in effect this weekend, beginning at 9 p.m. Saturday, continuing through Monday at 11 a.m.

MORE: Hot, dry and windy conditions in Bay Area to prompt critical fire danger this weekend

The hot weather is also prompting cities to open relief centers for the community. The city of San Jose will open four relief centers at two libraries and two community centers. The cooling centers will be open for residents on Sunday and Monday to beat the heat.

Camden Community Center at 3369 Union Ave. and the Vietnamese-American Cultural Center on 2072 Lucretia Ave. will be open from 1 to 9 p.m. Joyce Ellington Branch Library on 491 E. Empire St. and Edenvale Branch Library on 101 Branham Lane will be open from 1 to 6 p.m.

The Concord Senior Center will be open as a cooling center on Sunday and Monday, when temperatures are expected to top 100 degrees. The center, at 2727 Parkside Circle, will be open during the hottest part of the day, between 1 and 6 p.m., to provide a cool place for residents to escape the heat, Concord city officials said. All visitors will be required to check-in and complete a brief health screening. Social distancing protocols will be in place, and masks/face coverings are required. Masks will be provided, if needed.

It'll cool off from Monday, ever so slightly.

"Tuesday and Wednesday are no picnic," say Tuma. He forecasts places like Antioch and Walnut Creek to still see highs around 102 and 103 through Wednesday.

"The cooling off period is going to be so gradual that we'll likely stay in this heat wave for four days," he adds. "Even next weekend still looks pretty warm.

"There's unfortunately not going to be a 24-hour cooling difference that everyone is looking for."

If you're looking for a bright side with this heat wave, at least the air quality won't be terrible. It's expected to deteriorate starting Friday, but should only be in the "moderate" category, with an air quality index between 50 and 100.

RELATED: Track Bay Area air quality levels

"Visually you'll see that haze in the atmosphere, but the health effects really aren't too crazy and the air isn't too smoky."

It's not much of a bright side, but in 2020 we'll take what we can get.

Also, this weekend many folks are expected to hit our local beaches, seeking some relief but officials are urging folks to reconsider, in the name of safety.

WATCH: Stinson Beach residents worried folks will flock to the area amid heat wave

This weekend many folks are expected to hit our local beaches, seeking some relief but officials are urging folks to reconsider, in the name of safety.

"It gets too busy here and with COVID-19, it's dangerous for everyone," said Stinson Beach resident Shari Pate.

On Labor Day weekend, the beach got so crowded it was nearly closed.

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