View of fire from Calabasas High Baseball field. @ABC7 pic.twitter.com/CWp736VZfU — Marlene Luterman (@MrsLutee) June 5, 2016

View of Calabasas brush fire from the hills of Simi Valley. #abc7eyewitness @ABC7 pic.twitter.com/DfC5M3hWVd — Ryan (@Ryan63741965) June 5, 2016

CALABASAS, Calif. (KABC) -- Crews were responding to a raging 500-acre brush fire in Calabasas that threatened thousands of homes and buildings on Saturday.The Los Angeles County Fire Department responded to the fire at about 4:10 p.m. Capt. Keith Mora stated the initial call was for a car crash into a power pole with power lines down. Firefighters in the field reported seeing power lines down also.Deputies with the Los Angeles County Sheriff's Department said a black truck struck a pole in the 2300 block of Mulholland Highway. Witnesses told investigators the truck was speeding before it hit the power pole, knocking it over and causing a transformer to explode, sparking the fire.Officials said 5,000 people were evacuated from 3,000 homes. Air7HD captured flames touching some buildings.Fire officials stated Camp Wildcraft, a new campground set to open for the first time on June 13, appeared to be a complete loss.Shari Davis of Camp Wildcraft said while the camp portion may be heavily damaged, the oldest home in Calabasas, the Masson Residence, was saved by firefighters.The fire caused evacuations in Calabasas Highlands, Eddingham and Adamsville neighborhoods, officials said. If evacuated, authorities urged residents to head to Agoura High School located at 28545 W Driver Avenue in Agoura Hills.The Los Angeles Region American Red Cross responded to Agoura High School to provide evacuated residents with information, food, water, and emotional support.The City of Calabasas stated horses and large animals were to be evacuated to Pierce College, while small animals, like dogs and cats, were to be evacuated to the Agoura Animal Shelter.The California Highway Patrol announced that Topanga Canyon Boulevard between the Pacific Coast Highway and Cezanne Avenue would be closed until further notice.Ashes from the fire were reported in North Hollywood and Burbank, and even as far as Arcadia.ABC7 viewers reported seeing smoke from miles away.DEVELOPING: We will add more details to this report as they become available.