Chicago firefighters were called to the West Side Sunday afternoon as flames shot through the roof of a vacant factory building, according to fire officials. Crews were on the scene fighting the fire at the one-story building in the 4400 block of West Cermak Road in the city’s Lawndale neighborhood, said Chicago Fire Department Chief Juan Hernandez. “We don’t expect any injuries,’’ he said, adding that no one is believed to be inside. “Fire is through the roof.’’ The fire began at about 11:35 a.m. and was struck out at 12:55 p.m. as crews began ventilating the area. No injuries were reported.