After a weekend of consistently high temperatures, the heat wave in Southern California will ease slightly on Monday – but many inland areas will remain in the triple digits.
Temperatures will drop 10 degrees in many areas on Monday. But you might not notice a huge improvement considering how hot it was. The National Weather Service said the coast would see the greatest relief on Monday. Temperatures in the inland valleys still range from 105 to 117; Foothills will hit area 103-115.
Another temperature drop is planned for Tuesday.
The excessive heat warning, which runs through Monday evening in many parts of the region, is creating explosive conditions for firefighters fighting multiple flames in southern California.
The Bobcat Fire, which began above Azusa in the Angeles National Forest, grew to 4,871 acres overnight with extreme warnings of fire hazard. Staff at Mt. Wilson Observatory evacuated Monday morning when the fire raged on the site.
The ashes of the fire rained down along Corridor 210 and the Pasadena area, causing the South Coast Air Quality Management District to issue a smoke notice for the foothills communities and the Santa Clarita Valley by Monday to warn of unhealthy air for sensitive people .
In San Bernadino, the El Dorado fire spread overnight on the northeastern edge of Yucaipa. Authorities said the 7,000-acre fire was triggered by a "smoke-generating pyrotechnic device used during a gender unveiling party" in El Dorado Ranch Park on Saturday morning. The authorities urged the public to take all precautions against starting wildfire.
The Valley Fire, about 30 miles east of San Diego, also grew overnight, reaching 10,258 acres, but lagging 1% as the battle to finish its march in rugged East County terrain begins its third day. Monday brings a new tool into the fight: military aircraft. The California Department of Forestry and Fire Safety is pulling the trigger for a permanent agreement with the Navy's 3rd Fleet and 1st Marine Expeditionary Force to use military aircraft in the fire, Cal Fire spokesman Capt. Kendal Bortisser.
The valley fire has already destroyed 11 houses and 25 outbuildings in the Japatul Valley southeast of the Alps.
The extreme temperature at the weekend shook the records.
Woodland Hills posted an all-time high of 121 degrees on Sunday, which was the hottest temperature recorded by an official Los Angeles County weather station, according to the National Weather Service.
It broke the old record of 119 degrees in July 2006 and was one of several records that fell on Sunday. Escondido reached an all-time high of 115 degrees, breaking a record set in 1909. Paso Robles also reached an all-time high of 117, as did Idyllwild (104) and Chino (121).
A woman in her late 40s was hiking a trail in the Santa Monica Mountains of Calabasas when she felt sick and collapsed at 2 p.m. Saturday, said Juanita Navarro, deputy sheriff's assistant for the LA district.
The hiker was pronounced dead at the scene. The official cause of death is still unknown, Navarro said.
Because of the dangerous heat wave, all roads in the Santa Monica Mountains are closed until Labor Day, Malibu Search and Rescue said in a tweet.
In the Angeles National Forest, the Sheriff's Department Search and Rescue team conducted an air rescue Saturday on a semi-conscious hiker suffering from heat exhaustion on the popular Strawberry Peak Trail, where temperatures often rise because there is little in the afternoon Shadow there.