Janesville fire officials are investigating a blaze at 15 S. Lexington Drive. Shift Commander James Ponkauskas says firefighters responded at 11:22 p.m. Tuesday night and found flames coming from the front and back of the single story home. Ponkauskas says a single resident at home was awaken by the smoke detector and escaped. They were first treated on the scene and then taken to the hospital. Damage is extensive totaling more than $150,000 to both the structure and contents.