The fast moving brush fire, dubbed the Creek Fire, was reported around 4:00 a.m. local time. However, westbound lanes of State Route 126 from Copperhill Drive to the 5 Freeway remained closed.
Evacuation centers are open at the Sylmar Recreation Center, located at 13109 Borden Avenue.
The City of Santa Clarita announced on its emergency website that evacuations were ordered for 1,300 homes in the Westride agrea and in schools on Valencia Boulevard in Stevenson Ranch.
About 1,300 homes were evacuated in the Westridge community, along with the Rancho Pico, West Ranch and Oak Hills communities.
Earlier in the day, the northbound lanes of the 5 Freeway were closed at Magic Mountain Parkway while southbound lanes were closed at Hasley Canyon Road.
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The blaze was reported about 9:30 a.m.in the 25000 block of Rye Canyon Loop, according to the Los Angeles County Fire Department.
Road closures are in effect near the fire zone and residents are asked to avoid the area. As of 5:40 a.m., zero percent of the blaze has been contained.
West Creek Academy is closed for the remainder of the day and Trinity Classical Academy in Valencia is now evacuating students. Valencia High School and Santa Clarita Activities Center are being used at as evacuation center.
Power was interrupted to about 2,090 customers in the Santa Clarita area, according to Southern California Edison.
"Our fearless men and women of the Los Angeles County Fire Department are working tirelessly in coordination with other first responders to protect lives and property and stop the forward progress of the devastating fires", said Supervisor Barger.