Two families at 33 Orange Street in Bridgeport are left out in the cold as a fire swept through the two family home around 10pm Tuesday night.  Occupants told me they thought a tenant on the 2nd floor put a cigarette into the trash that may not have been fully extinguished.  Assistant Fire Chief Dominick Carfi could not verify this being so early in the investigation but said there was a trash can in the back and that it was in fact fully involved.  Fire fighters did rescue a dog and reunited him with his owner.  It was not determined how many were left homeless from the fire.  No firefighters were injured.  Icing conditions were a concern, I noticed it was 17 degrees when I returned to my car.