The National Weather Service issued heat warnings and heat advisories for much of Southern California this week, as another heat wave could send temperatures into the triple digits.
A heat warning is in effect for the valleys of Los Angeles County, and a heat advisory issued for the Inner Coast, including Downtown LA Both expire Tuesday at 8 p.m.
Valleys could see temperatures as high as 102 degrees through Wednesday, and mountains and deserts could reach 100. Coastal areas are expected to be only a few degrees warmer than normal, reaching around 88 degrees.
Although still dangerously hot in some areas, the current heat wave is only expected to last about two days and is at the lower end of the season. historic heat wave at the beginning of the monthaccording to Andrew Rorke, a senior National Weather Service forecaster in Oxnard.
“It’s a much shorter duration and noticeably lower temperatures,” Rorke said.
A mass of high-pressure hot air, compounded by a slight offshore thrust delaying sea breeze, is driving the current period of extreme heat, Rorke said. But he reassured Angelenos that it’s not deja vu from the historic heat wave that began in September: Temperatures are expected to be 5 to 10 degrees cooler, and the event will be seven days shorter, according to the National Weather Service in Oxnard.
“This is by no means a record heat wave,” Rorke said, adding that because it’s a Santa Ana season, the records are “high and out of reach.” And unlike the last heatwave, lows won’t stay so stubbornly high that “there’s no hope overnight,” he said.
Further south, heat warnings are in effect for the Inland Empire until 8 p.m. Wednesday. Inland Orange County could reach 100 degrees, and Inland Empire could see temperatures reach 106.
A heat advisory is in effect until 8 p.m. for coastal areas of Orange County, where temperatures could reach 92 degrees.
The current period of high temperatures is being moderated slightly by lower humidity levels, said Mark Moede, meteorologist with the San Diego Weather Service. “The lower humidity than we had weeks ago will make it a bit more tolerable,” Moede said.
High fire danger is an ongoing concern during a heat wave, but meteorologists say they don’t predict Santa Ana winds this week, lowering that threat level.