Firefighters battle brush fire in Sepulveda Pass along 405, Hughes Fire near Castaic Lake

The Hughes Fire near Castaic Lake has grown to about 10,176 acres and is 14% contained, according to the government website InciWeb.

Interstate 5 between State Route 126 and Grapevine Road has reopened in both directions, Caltrans announced Wednesday evening.

That stretch of the 5 had been shut down due to the Hughes Fire.

Caltrans says the Lake Hughes Road and Parker Road off-ramps from the northbound I-5 remain closed.

Crews are gaining an upper hand on the Hughes Fire, which has not yet damaged or destroyed any structures, officials confirmed.

L.A. County Fire Chief Anthony Marrone said approximately 4,000 firefighting personnel have been assigned to battle the blaze, which has charred more than 9,000 acres by 5 p.m. Wednesday.

Fortunately, no structures were destroyed or damaged by the fire. And the fire chief intends to keep it that way.

He said there are plans in place for crews to stay on the scene throughout the night to gain more perimeter control and to attack any hot spots that may erupt.

A red flag warning was extended Wednesday afternoon and is now in effect through Friday morning for most of Los Angeles and Ventura counties due to extremely low humidity and offshore wind gusts, according to the National Weather Service.

The windy conditions are expected to strengthen or expand Wednesday night or Thursday morning, with winds peaking Thursday. The winds will increase to 20 to 30 mph, with gusts up to 50 mph by Thursday. The winds are expected to gradually decrease Thursday night into Friday.

Humidity will be extremely low with minimums under 10% and poor overnight recovery.

"While the winds will gradually weaken and shrink in coverage Thursday night through Friday morning, pockets of gusty winds and widespread extremely dry conditions will maintain Red Flag Warning conditions through Friday morning," the weather service said in an alert.