A third alarm fire 642 South 10th Street in downtown San Jose. First reports that came in were people potentially trapped, one person passed out on the front lawn and people going inside to rescue someone in a wheelchair. Med 30 reported smoke showing from Bird and 280. As crews were in route a second alarm was called. Fire crews on scene reported heavy fire from the Bravo Charlie corner and were dropping hose lines to start a rescue response. It was determined all occupants were out of the structure and fire attack became priority. Fire crews faced struggles of stairs falling in and attic space that was blocked and filled with materials. A third alarm was struck when the amount of work was determined to be more extensive than initially thought. There was a scare when emergency traffic reported a fire fighter down but he was able to extricate himself without injury. He was evaluated on scene. 2 patients were transported by Rural Metro which had a task force 1 response. The cause is under investigation and crews will remain on scene.