The Ontario Fire Marshall's office along with Chatham-Kent Police and Chatham-Kent Fire and Rescue are continuing to investigate a fatal fire.
It broke out Sunday on King Street East.
Police say evidence obtained shows the fire originated within a temporary structure where the victim was located.
There is no indication of arson.
The blaze claimed the life of a 66-year old woman.
Police say the family has requested that her name not be released.