A manhunt is underway for the person suspected of starting the Pacific Palisades brushfire.

According to Los Angeles Fire Department spokesman Nicholas Prange, the fire started around 10 p.m. Friday in a remote area off Michael Lane and Palisades Court.

Members of the sheriff's Special Enforcement Bureau were looking for a person suspected of starting a brushfire that had scorched about 750 acres and was raging in Pacific Palisades on Saturday.

The South Coast Air Quality Management District issued a smoke advisory Sunday night, advising those who smelled smoke or saw ash to limit their exposure by staying indoors with windows and doors closed or seeking alternate shelter, as well as avoiding vigorous physical activity.

Deputy Alejandra Parra of the Sheriff's Information Bureau confirmed the search.

The Los Angeles County Fire Department received a flare-up report at 4:07 p.m. Saturday and dispatched a full first-alarm brush assignment as well as fixed-wing air tankers to assist in containing a fire that the agency estimated at 100 acres with a potential for 500 acres and was now threatening structures, according to fire officials.

Because structures were to the south and west, and the flames were pushing north, there was no immediate threat to structures.

The Los Angeles County Fire Department requested four additional fixed-wing air tankers as flames advanced to the north, according to a tweet from the department at 5:08 p.m.

A Temporary Flight Restriction for the area has been requested.

Mandatory evacuations are in effect in Zone 4, which includes everyone east of Topanga Canyon between the Community House and View Ridge, and Zone 6, which includes everyone north of Entrada, south of Oakwood, and east of Henry Ridge.

Meanwhile, large animals can be taken to Pierce College in Woodland Hills.

According to Malibu Emergency Services, Topanga Canyon Boulevard was closed between Mulholland Drive and Pacific Coast Highway due to firefighting activity, though there was no threat to Malibu at this time despite the large plume of smoke visible.

Wind gusts of 15-25 mph from the south-southwest were propelling the flames, according to the National Weather Service. The agency tweeted, “Humidities are 50% or higher, but fuels are VERY dry.”

Due to poor visibility, air tankers assisting with the fire were grounded on Saturday evening.

According to Margaret Stewart of the Los Angeles Fire Department, residents in the area may have seen a large plume of smoke.

Stewart explained that the fire slopped over, which means that the fire's edge crossed a control line, as opposed to a'spot fire,' which is ahead of the fire body.

Because the threatened area of land to the west is within the State Responsibility Area, she said, the Los Angeles County Fire Department will now participate in a Unified Command with the Los Angeles Fire Department and CAL-FIRE. A Ventura County chopper assisted the LAFD and LACo Fire Department water-dropping helicopters.

“The terrain is extremely steep and difficult to navigate, which impedes ground-based firefighting operations,” Stewart explained. “The majority of firefighting is done from the air.”

At about 5:15 p.m., the sheriff's Lost Hills Station reported that it was preparing to evacuate an area that included Cheney Ranch Road and the Entrada community.

According to Los Angeles Fire Department spokesman Nicholas Prange, the fire started around 10 p.m. Friday in a remote area off Michael Lane and Palisades Court.

Stewart stated that no injuries had been reported. “The weather is cool and damp (due to high humidity).”

“Last night's firefighting efforts were primarily from the air, with LAFD helicopters making continuous water drops until 5 a.m., when the aircraft required maintenance,” she explained.