Triple-digit heat to sear Bay Area
Soaring temperatures Tuesday and Wednesday will put some interior Bay Area cities into tripledigit territory, while coastal areas are forecast to be around 30 degrees cooler.
The stark microclimate pattern will loosen its grip by the second half of the week, when hot inland cities will see temperatures drop to a more seasonable range, forecasters said.
The sizzling temperatures began on Monday. By 2 p.m., Livermore hit 100 degrees, said National Weather Service forecaster Steve Anderson. Concord was a few degrees behind at 97, and Santa Rosa was at 93, he said.
The sweltering heat isn’t expected to break records, but the numbers were forecast to creep close to record-high territory before a cooling trend sets in later in the week.
“It’ll take until Thursday, but the places in triple digits will cool into the upper 80s and 90s,” said Ryan Walbrun, a weather service meteorologist. “The cooldown won’t be dramatic by any stretch, but when you go from 103 to 80, it feels a lot better.”
A marine layer on the coast will put most cities closer to the bay in the 70-degree range for the week, Walbrun said. Downtown San Francisco, for instance, only reached 69 degrees Monday and is expected to be about the same Tuesday.
“You won’t have to get too far inland to find the 80s and 90s,” Walbrun added.
The drop in temperatures for the second half of the week is expected to usher in a pleasant Fourth of July weekend, forecasters said.
Expecting bad air quality from a combination of hot weather and exhaust from traffic, the Bay Area Air Quality Management District issued a Spare the Air smog alert for Tuesday.
Officials warned that an unhealthy accumulation of ozone was expected in the area, which can cause throat irritation, congestion and chest pain; trigger asthma; inflame the lining of the lungs; and worsen bronchitis and emphysema.
Jack Broadbent, executive officer of the air quality management district, said the best way to help reduce smog is to drive less.
“First, we are alerting Bay Area residents that air quality is expected to be unhealthy and to take precautions to protect their health. Second, we ask them to help reduce pollution by taking transit, carpooling, walking or biking, instead of driving alone,” Broadbent said.