Stake out some shade. Break out the bathing suits. Clean out the kiddie pool.

If you think Thursday was hot, hold on, because triple-digit temperatures are coming. But as you suffer through the swelter, remind yourself: At least I'm not in Arizona.

While triple-digit temperatures will roast some corners of the region, the Bay Area will be cool by comparison, as a massive high-pressure system will push highs in desert locales such as Death Valley and Phoenix far past 110 degrees, according to the National Weather Service.

The Bay Area heat wave comes just days after an unseasonably cloudy and wet start to the summer. High temperatures could stay near 100 degrees through Monday in some communities before finally cooling down midweek.

"There's pretty much a big blop of high pressure sitting over the western states causing warm weather, offshore flow and rising temperatures," said Diana Henderson, a forecaster with the National Weather Service.

In Contra Costa County, Brentwood and other nearby cities are expected to hit up to 104 degrees Friday and stay that hot through Monday. Central County communities such as Concord, Walnut Creek and Danville will be in the high 90s to the low 100s.

In Alameda County, Pleasanton may reach 99 degrees Friday and is expected to hit 103 by Monday, while Livermore's predicted high Monday is 101. The inner East Bay will remain cooler, with highs from the mid-80s to the low 90s from Oakland south to Fremont.


Advertisement

South Bay temperatures are expected to be only slightly cooler, with a high of 96 in San Jose and 92 in Palo Alto on Monday. Along the Peninsula, San Mateo will see a high of 79 and Redwood City a high of 89.

With the extreme heat comes concerns about fires, power usage and health.

PG&E spokeswoman Tamar Sarkissian said the utility has extra staff ready to handle power outages in light of the extended period of high temperatures and likelihood of customers using more power.

"We can't predict when and where power outage might happen, but we are prepared," she said.

The state's power grid is expected to be able to cope with any surge in demand from the heat.

Steven Greenlee of the California Independent System Operator said demand usually drops on weekends as office buildings and some manufacturers shut down, though they "might pull a little more juice" come Monday to cool stuffy buildings.

"We're going to be watching things closely," he said.

While no Spare the Air alerts or Red Flag Warnings have been issued, fire danger and air quality remain primary concerns every time the temperature ticks upward, Henderson said.

Christine Rosellis with the Bay Area Air Quality Management District said officials will be closely watching conditions, ready to declare Spare the Air alerts if they're needed.

"Anytime you have high pressure sitting overhead, that does affect the air quality," Henderson added. "It should be dramatically uncomfortable for most people."

Experts suggest that ways to beat the heat include staying out of the sun, wearing broad-brimmed hats outdoors and drinking lots of water. Authorities say parents and pet owners should absolutely not leave children or pets in parked cars, where the temperature can quickly prove fatal.

Mike Guzzardo, event organizer for Saturday's Paddle for Fame event in Discovery Bay, where hundreds of paddleboats gather for a party in the Delta town's harbor, is giving eventgoers similar advice.

"We're been trying to tell people on Facebook that it will be hot out there. The key is to stay sober and stay hydrated, and make sure you have shade and suntan lotion," he said.

Surprisingly, perhaps, the high on Bethel Island is forecast to be well over 100 degrees, but at least some residents there are prepared.

While Loraine McWhorter cools her pet birds down with a hose atop their cage, Lindsey Wagner-Jauregui takes to the water.

"Hop in the boat and head to the beach around the corner from our house," she said in a Facebook post. "Put a life jacket on your legs — we call it a diaper -- and we float ... Coors can in hand."

While air-conditioned movie theaters and retail stores may be popular places to hang out, officials that run community swimming pools are also expecting an increase in activity.

"There are more people are coming in from the heat," said Patty Holtz, a lifeguard at Pittsburg's Sullenberger Swim Center at Buchanan Park.

That outlook is a far cry from just last Sunday, when rain made an unexpected appearance right after summer started.

"Sunday was the day we had one person in the pool and it was sprinkling," she said.

Staff writers Eve Mitchell and Rowena Coetsee contributed to this report. Contact Paul Burgarino at pburgarino@bayareanewsgroup.com. Contact Erin Ivie at eivie@bayareanewsgroup.com.