Cambridge Ontario Canada, April 24 2013 2:30 am well involved house fire at 11Victoria St. Firefighters rescued two occupents from the upstairs unit, one on the roof and one through a window. Three aerials, one pumper, one heavy rescue, and the Platoon Chief were on-scene. There was heavy fire at the outside stairwell and second floor on arrival. Firefighters were pulled from building 15 minutes after arrival when a firefighter fell partially through the stairwell. Two aerial master streams were used to knock the fire down.