SAN DIEGO (FOX 5/KUSI) — Cal Fire crews are battling a brush fire that erupted on Otay Mountain Thursday afternoon, with evacuation orders and warnings in place for surrounding areas. The fire, which has been named the "Border 2 Fire," was reported after 2:15 p.m. in the area of Otay Mountain Truck Trail in the Otay Wilderness Area. The fire jumped from 350 to over 500 acres within a half hour at one point. According to Cal Fire, it is currently at 4,250 acres as of 2:14 a.m. Friday, "with long range spotting and extreme fire behavior." Fire officials said the blaze was at 10% containment. Cal Fire issued an evacuation order for residents who live in the red shaded areas shown in the maps below. This means that there is an immediate threat and "you need to leave." An evacuation warning has also been issued for the areas in yellow. Officials said, "Be prepared to evacuate should conditions change. If you feel you are in danger, go!" A temporary evacuation point has been set up at Regal Edwards Cinemas Rancho San Diego, located at 2951 Jamacha Rd. in El Cajon. Another evacuation point is operating at Southwestern College, located at 900 Otay Lakes Rd. in Chula Vista. The American Red Cross is supporting both evacuation points, with volunteers providing snacks, hydration and other assistance.  There are a few transmitters used by U.S. Customs and Border Protection on top of the mountain and several structures at its base — including two detention centers. The fire caused a massive plume of smoke to blow from the mountain. Due to the Santa Ana winds, the smoke appeared to be moving west, over Otay Mesa and Tijuana. “The way it spread in the last couple hours," Christian Trip, a local resident, said as he watched the flames burn down the mountain. "Even two, three hours ago, it was tiny and now look at this. It’s surreal.” A smoke advisory has been issued by the San Diego County Air Pollution Control District for communities in the southwest of the county. The smoke is expected to continue blowing west through Friday morning, the district adds, with winds weakening overnight. "In areas where you smell smoke it is advised that you limit physical/outdoor activity," the district said. "If possible, stay indoors to limit your exposure to fine particulate matter and ozone, especially those residents with respiratory or heart disease, the elderly, and children." Officials with the City of Chula Visa closed all parks and recreation centers early Thursday over the air conditions. Meanwhile, the San Diego County Sheriff's Department announced Thursday the closure of Alta Road, located just south of Otay Mesa Road. The public is asked to avoid that area until further notice. Additionally, Cal Trans announced Friday that westbound and eastbound State Route 94 at Otay Lakes Road is closed due to the fire, More than 200 firefighters responded to the blaze, naming the strong winds, low humidity levels and dry vegetation as fuel for the flames. Photos captured from fires in La Jolla, Otay Mountain “The brush and the vegetation throughout the county spent all summer long drying out, and we have not had any measurable rain this rainy season,” Cal Fire Cpt. Robert Johnson said. While the area is seeing a below average water year so far, rain is expected Sunday. That usually can cause mudslides or flooding in burn-scarred areas, but Johnson says because of the location of the Border 2 Fire, he doesn’t expect that to threaten any structures once they put out this wildfire. “The rate of spread of this fire and the fire conditions is not abnormal for this area," Cal Fire Captain Robert Johnson said. "What is abnormal is that we’re experiencing these conditions in the month of January.” The fire is one of two that sparked almost simultaneously at different parts of the county as high winds continue to lash the region. The second ignited in La Jolla, prompting emergency officials to issue evacuation orders for nearby areas. All orders have since been lifted. Much of the county has been under a Red Flag Warning throughout the week for conditions that could create critical fire risk, given continued arid weather and Santa Ana winds. According to the National Weather Service, wind speeds in the area of the Border 2 Fire were recorded of 28 miles per hour, with gusts up to 38 miles per hour. Meanwhile, relative humidity was placed around 6%. Fire crews were quick to put out a number of potentially dangerous fires throughout the week, including several that burned outside the boundaries of the area under a Red Flag Warning. The pair of brush fires brought the total number of blazes to erupt to three on Thursday alone. This is a developing story. Check back for updates.