A man moving into an apartment in a Niagra Falls home called the gas company after smelling an odor.
When he returned, the house was fully engulfed in fire and his second-floor apartment was full of debris from the collapsed roof and chimney, according to the Niagra Gazette.
A woman and dog who live in first-floor apartment escaped without injury.
Firefighters encountered heavy fire from all sides.
Houses on both sides of the structure were damaged.