Companies got the dispatch for the dwelling fire at 22 N. Rigby. 19-9 arrived o/s reporting smoke showing from a very large 3-1/2 story monster twin. Crews advanced an 1-3/4 wtr line to the 1st floor rear kitchen. Fire had extended into the walls and cieling. Ladder crews opened the roof of the 1 story rear section and ventilated. 1 F/F was transported to H.U.P. with a head injury after something fell on top of him.