A total of 2,937 firefighters are battling the blaze, according to the U.S. Forest Service.
Fire officials advised residents of nearby communities to be prepared to leave immediately if a voluntary or mandatory evacuation order is issued.
At least 18 dwellings burned over the weekend, and the body of one man was found on Saturday evening in a burned-out auto parked in the driveway of a home. Jerry Brown, who is attending the Democratic National Convention.
The fire destroyed film sets at Sable Ranch in Santa Clarita, which has Old West-style buildings used for movie locations.
"It's not a surprise to see the fires behaving the way they are and the number of fires we've already had", said Tom Rolinski, a meteorologist for the United States Forest Service.
Fire officials noted returning residents must provide proper identification, and that three areas, including Placerita Canyon Road from Running Horse Lane to Pacy Street, were still closed. Warmer conditions in the fall mean that the fires burn longer too.
"Evidently, he did not want to evacuate", Winter said. "We put the dog and two cats in the auto and high-tailed it out of here".
"I'm still at work and trying to get a hold of this fire (the Sand Fire), trying to protect the other structures that are around the area", Toscano told KABC.
The 3,000 firefighters faced another day of temperatures in the 90s to low 100s as they fought the fire, aided by fleets aircraft dropping retardant and water and hundreds of fire engines.
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"They said 'we can't force you out, '" Alvarez said. Also, one person was killed and 18 homes have been destroyed. Firefighters found his body inside a burned auto that was parked in a driveway at a home on Iron Canyon Road. Fire Departments offer "Aid" to their neighbors, and in turn have help available to them when emergencies overwhelm their resources.
"The flames were right behind our backyard", he said.
The Soberanes Fire has scorched almost 23,500 acres (9,510 hectares) at the edge of the Los Padres National Forest since it broke out on Friday and some 2,300 firefighters had the blaze about 10 percent contained on Wednesday, officials said.
According to the California Highway Patrol, some law enforcement personnel standing guard at closed streets were almost run over by people driving carelessly as they tried to get back to their homes. It became more hard to battle the fire on the ground, so firefighters had to rely on aerial fire assaults.
"Recent drone activity has occurred over the fire in the Bear Divide Area".
Gov. Matt Mead activated a National Guard helicopter to assist, and more specialized firefighters and large air tankers are being added as the blaze burns out of control.
Earlier this month, a Placer County man was arrested in Northern California for allegedly piloting his hobby drone in June over the Trailhead Fire north of Sacramento.
Incident commander Mike Wakoski called conditions "explosive" with very fast fire movement.
The conditions are extremely dry and the surrounding heavy smoke is nearly challenging the efforts of the firefighters.
It was more than "100 degrees on the fire line" on Monday, said Marc Peebles, a spokesman with the federal interagency management team on the fire.