High temperatures and high humidity will combine Tuesday to create a hot spell in Southern California, prompting the National Weather Service to issue a heat advisory for several communities and warn area residents to guard against heat-related illnesses.
“Very high temperatures will create a dangerous situation in which heat illnesses are possible,” warned an NWS statement, adding that in Tuesday’s weather, people or pets must not be left in parked vehicles because interior temperatures “can quickly rise to life-threatening levels,” even if windows are partially open.
The NWS issued a heat advisory that will be in effect from 10 a.m. to 8 p.m. in the San Fernando, Santa Clarita and San Gabriel valleys as well as the Santa Monica Mountains Recreational Area.
“A Heat Advisory means that a period of hot temperatures is expected,” warned the NWS statement. “The combination of hot temperatures and high humidity will combine to create a situation in which heat illnesses are possible. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.”
Also, “limit outdoor activities, especially during the hottest part of the day; drink plenty of fluids, avoiding cafeine and alcohol; dress in loose-fitting, and light-colored clothing,” the NWS recommended.
In a separate statement, the weather service warned that “temperatures will warm significantly” Tuesday “as Santa Ana winds develop across the area. This will be followed by a notable cooling trend and a chance of light rain late in the week and into the weekend.”
In the meantime, gusts as strong as 45 miles per hour may whip across mountain areas, and some communities will reach triple-digit territory or close to it. Highs are expected to hit 92 degrees in Downtown L.A., 94 in Yorba Linda, 98 in San Gabriel, 99 in Burbank and Saugus, 100 in Pasadena and 102 in Woodland Hills.
Temperatures in some communities will be 10 degrees or more above normal, said NWS meteorologist Kristen Stewart. Downtown L.A., where 82 is the normal high, will reach 92 Tuesday. Burbank, normally 85, will hit 99 degrees. She said the high heat and “low to moderate” Santa Ana Winds would combine to create “elevated fire danger” amid humidity levels of 8-15 percent near the coast.
The NWS forecast sunny skies in L-A County Tuesday and highs of 79 in Avalon; 84 on Mount Wilson86 at LAX; 90 in Long Beach; 92 in Downtown L.A.; 93 in Palmdale; 94 in Lancaster; 98 in San Gabriel; 99 in Burbank; 100 in Pasadena and Saugus; and 102 in Woodland Hills. Temperatures will drop by up to 17 degrees Wednesday and by up to another 11 degrees Thursday, this time under mostly cloudy skies.
Sunny skies were also forecast in Orange County Tuesday, along with highs of 75 on Santiago Peak; 77 in Laguna Beach; 78 in San Clemente; 79 in Newport Beach; 88 on Ortega Highway at 2,600 feet; 92 in Fullerton, Irvine and Mission Viejo; 94 in Trabuco Canyon; 96 in Anaheim and Fremont Canyon; and 97 in Yorba Linda. Temperatures will fall by up to 12 degrees Wednesday and by up to another six degrees Thursday under partly cloudy skies.