Firefighters were called to a blaze at the Raintree Island Apartments in Tonawanda at around 8 a.m. on Wednesday.
The fire was contained to one apartment and there were no injuries, though a cat died in the blaze. Several other apartments were damaged by smoke and water. The cause remains under investigation and there is no damage estimate available.
Tonawanda Police also responded to the scene, and Brighton Fire provided mutual aid.
The Red Cross is assisting residents.