(CNN) California Gov. Jerry Brown issued a state of emergency for Los Angeles County on Sunday due to the ongoing La Tuna brush fire near Burbank. 
 
 Since the fire started Friday, it has burned more than 5,895 acres , forced residents to evacuate from their homes, shut down an interstate and sent massive plumes of smoke into the air. 
 
 Brown's declaration will allow state personnel and equipment to be used in fighting the fires, at the direction of the California Office of Emergency Services. 
 
 But there were signs Sunday night that emergency personnel were beginning to drive back the blaze. 
 
 More than 1,000 firefighters from the immediate region and throughout California are battling the fire, which has destroyed three homes and damaged one other, Los Angeles Fire Department Chief Ralph Terrazas said during a press conference Sunday. Burbank is in Los Angeles County. 
 
 There are 206 fire engines and nine helicopters dedicated to fighting the fire, Terrazas said. 
 
 Strong winds 
 
 The fire started Friday and tore through the La Tuna Canyon Park area of the Verdugo Mountains, the Los Angeles Fire Department said 
 
 Los Angeles Mayor Eric Garcetti signed a declaration of local emergency on Saturday that instructed all city agencies to "take all necessary steps to protect life and property in the area" affected by what is now the largest fire the city has ever seen. 
 
 "The La Tuna Canyon Fire is an emergency that requires all available resources to protect our residents and keep our homes and other structures out of harm's way," Garcetti said in a statement. 
 
 Garcetti said Saturday that 300 homes in Burbank and 180 homes in Los Angeles were under evacuation orders. 
 
 There were four reports of injuries: two people suffered dehydration and two had minor burns. 
 
 "We do not have this fire contained," Garcetti said, but officials have "identified ways we can bring this fire to rest" in coming days. 
 
 Rain on Sunday was a mixed blessing, Terraza said, as it brought much needed moisture, but also strong winds that have blown the fire around. 
 
 On the fire line of #LaTunaFire #LAFD continuing full ops through the night to include @LAFDAirOps 📷Peter Sanders pic.twitter.com/AcMOcOEvw0 — LAFD Talk (@LAFDtalk) September 2, 2017 
 
 At least 100 firefighters who were sent to Houston to help in Hurricane Harvey recovery efforts were heading back to California to help with the fire, Terrazas said at the Saturday news conference. 
 
 According to Terrazas, it is the largest fire, by acreage, that the Los Angeles city area has ever seen. 
 
 Hot temperatures and high winds on Friday in the Los Angeles area contributed to the "large plume growth and extreme fire behavior," the National Weather Service office in Los Angeles said. 
 
 Update: still very erratic Fire behavior on the #LaTunaFire as winds continue to change, Fire has entered #Burbank city limits. #Breaking pic.twitter.com/ztMKxelGAI — Bernie Deyo (@EPN473) September 1, 2017 
 
 "These weather factors will result in the potential for rapid fire spread in the warned area through at least Saturday evening," the weather service said. 
 
 There are currently more than 12,000 firefighters battling 19 wildfires across the state of California, according to the California Department of Forestry and Fire Protection. ||||| Mandatory evacuation orders came into effect in parts of Burbank Sept. 1, as fire crews battled a fast-growing brush fire. (Los Angeles Fire Department via Storyful) 
 
 A fast-spreading brush fire north of Los Angeles forced hundreds of people to evacuate their homes Friday and Saturday as firefighters struggled against triple-digit temperatures and erratic winds to contain the blaze, officials said. 
 
 Within a day, the wildfire — named the La Tuna Fire for its origin in La Tuna Canyon to the north of Burbank — had grown to cover more than 5,000 acres, according to the Los Angeles Fire Department. In all, about 300 homes in Burbank, 250 homes in Glendale and 180 homes in Los Angeles were under evacuation as of Saturday afternoon. 
 
 As of Saturday, the fire was 10 percent contained. Although no injuries were reported, one home had been destroyed, the fire department said. 
 
 “This continues to be a very dynamic fire,” Los Angeles Fire Chief Ralph M. Terrazas said at a news conference Saturday. “The weather conditions are somewhat stable, but that could change at any moment.” 
 
 [San Francisco smashes all-time high, hits 106 degrees] 
 
 Terrazas added he was confident the fire had burned “well above” 5,000 acres as of Saturday afternoon, but he was not able to give a fixed acreage. Earlier in the day, Los Angeles Mayor Eric Garcetti confirmed that by acreage, the blaze was the largest in the city’s history. 
 
 Fire officials said erratic wind and weather were posing the greatest challenges to extinguishing the fire. Authorities were particularly concerned about how quickly the blaze could spread in the area’s canyons. 
 
 “This is a slow burning, ‘backing’ fire (meaning it burns down hill) and we have resources at the base of the hills to defend homes,” fire spokeswoman Margaret Stewart said in a statement. “When the fire encounters a canyon, it can accelerate and burn uphill.” 
 
 Video taken Saturday morning near La Tuna Canyon Road, over the hills to the north of Burbank, showed flames and heavy smoke. 
 
 The La Tuna Fire was first reported about 1:30 p.m. Friday as a small, one-acre vegetation fire south of Interstate 210 near Burbank. Although firefighters quickly extinguished the bulk of that fire, high winds caused embers to jump across the highway, sparking a spot fire north of I-210, Stewart said. 
 
 Within a few hours, more than 250 firefighters from multiple agencies had been dispatched to the fire, which had grown to 500 acres and shut down a portion of I-210. 
 
 By 9 p.m. Friday, the fire had tripled in size to 1,500 acres. Authorities soon ordered mandatory evacuations, street by street, for neighborhoods in Burbank closest to Verdugo Mountain Park. A surreal scene unfolded in Burbank as bright flames could be seen coming over the hilltops to the north of the city. 
 
 @BurbankPD helicopter TFO took this photo a few minutes ago from high above #Burbank. #LaTunaFire pic.twitter.com/mQ42ZKfzd7 — Burbank Police (@BurbankPD) September 2, 2017 
 
 Nearly 200 homes in Burbank were evacuated late Friday, with police officers going door to door throughout the night to ensure residents had left the area. Police continued to enforce new mandatory evacuation orders throughout Saturday. 
 
 Just before midnight, the Los Angeles Fire Department reported that the La Tuna Fire was burning in four directions, including down over the hills toward Burbank and north through the La Tuna Canyon above I-210. The fire’s “erratic” spread was “driven by strong, gusting winds,” the agency said. 
 
 #LaTunaFire General burn area of fire +5,000 acres 10% contained 1 house lost Detailed evac map pending List here https://t.co/YrRAiGk9Tv pic.twitter.com/KduKAoUzdJ — LAFD (@LAFD) September 2, 2017 
 
 California has been experiencing a severe heat wave, expected to last through Labor Day. 
 
 Carol Smith, a National Weather Service meteorologist, told the Los Angeles Times that a combination of conditions were working against firefighters: temperatures of up to 106 degrees, 50 mph gusts of wind and unstable air. 
 
 “It just really stokes the fire,” Smith told the newspaper. “I mean, when it’s hot and the gusty winds, it’s been a bad mix of different things.” 
 
 As of Saturday afternoon, more than 500 firefighters were on scene, and a large portion of I-210 remained closed. Officials cautioned residents in the area to stay indoors and avoid outdoor activities because of heavy smoke. Police expect mandatory evacuation orders to remain in place into Sunday afternoon. 
 
 “Despite fire size, we remain confident in the plan in place and the work all firefighters at the incident are doing in defending property and lives,” the Los Angeles Fire Department said. 
 
 1 of 14 Full Screen Autoplay Close Skip Ad × Photos of a fast-spreading wildfire burning north of Los Angeles View Photos The Los Angeles Fire Department has issued a mandatory evacuation order for residents in Burbank, Calif., as a raging brush fire threatens their homes. The fire north of Los Angeles also has shut down both sides of key freeway for holiday weekend travel. Caption The Los Angeles Fire Department has issued a mandatory evacuation order for residents in Burbank, Calif., as a raging brush fire threatens their homes. The fire north of Los Angeles also has shut down both sides of key freeway for holiday weekend travel. Sept. 2, 2017 The La Tuna Canyon fire burns at night in the hills above Burbank, Calif. The brush fire, which quickly burned 3,000 acres, was being driven by heat-wave temperatures and high winds. Robyn Beck/AFP/Getty Images Buy Photo Wait 1 second to continue. 
 
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– Houston is underwater, but Los Angeles is on fire as the largest wildfire in its history burned at least 5,000 acres and forced hundreds of people to evacuate amid scorching temperatures and unpredictable winds of up to 50mph. "The La Tuna Canyon Fire is an emergency that requires all available resources to protect our residents and keep our homes and other structures out of harm's way," LA Mayor Eric Garcetti said Saturday, per CNN. The fire, which broke out Friday near Burbank, is about 10% contained, notes the Washington Post. At least 100 firefighters who had been sent to help Houston in the Harvey aftermath were being recalled home.