LOS ANGELES (CNS) - Temperatures reached the triple digits in much of the San Fernando Valley and 92 in downtown Los Angeles today but slightly lower  afternoon temperatures are forecast for Friday. 

The above-normal temperatures are the result of a strong upper level high pressure system forecast to continue into next week, according to the National Weather Service.  

The upper level high will shift east a bit tomorrow to slightly lower heights and thickness, which will cool afternoon temperatures “just a bit,” but they will remain above normal, according to the National Weather Service.  

The hottest spot in Los AngelesCounty was Acton, where the high was 108, one degree warmer than Palmdale.  

The high reached 106 in Lancaster and Saugus, 105 in Chatsworth and Woodland Hills, 103 in Pomona, Northridge and Van Nuys, 101 in Pasadena, 98 in  Burbank, 96 in San Gabriel and Sandberg, 93 at the Long BeachAirport and 92 in downtown Los Angeles and Mount Wilson.      

The high temperatures prompted Dr. Jonathan Fielding, Los AngelesCounty's public health director to warn the public that “extreme heat such as this is not just an inconvenience, it can be dangerous and even deadly.”  

“Everyone should remember to take special care of themselves, children, the elderly and their pets,” Fielding said. 

Among the warnings issued by the Department of Public Health was to never leave children or pets in parked vehicles, even if the windows are open or cracked. Interior temperatures can quickly rise well beyond the ambient temperature.  

Jan Selder, director of field operations for Los Angeles Animal Services, said the department receives many calls about animals with heat stroke when temperatures soar.  

“You just stop at Starbucks for five minutes to get coffee, but that's enough to make your animal very sick,” Selder said.  

Dog walking should be done in the morning or evening.  

“Don't go for hikes or play really hard in the middle of the day. It's too much exertion for the dog,” Selder said. 

Selder suggested:  

-- making sure pets have shade, fresh drinking water and proper identification tags or microchips;   

-- being aware of hot pavement or sand that could burn an animal's feet;  

-- keeping a veterinarian's telephone number handy in case of an emergency;  

-- making arrangements for someone to care for your pets if out of town during extreme heat; and 

-- never leaving unsupervised pets in cars, where the inside temperature can rise nearly twice as high the outside temperature, and reporting any pets stranded in hot vehicles.  

County health officials urged people planning to take part in outdoor activities to be prepared for the heat. A list of available cooling centers is posted online at:


County officials urged people working or exercising outdoors to drink plenty of water and avoid sweetened drinks, caffeine and alcohol, take frequent rests, and to watch for signs of dehydration, such as dizziness, fatigue, headaches and muscle cramps.