One home on Rowand Street was seriously damaged after a Monday morning fire.
Thunder Bay fire rescue says they got the call around 7 a.m.
A single-story home was on fire when they arrived, with smoke coming from the windows and flames coming from a side window, according to a news release.
Firefighters attacked the outside with water and got inside to fight the fire and search the building.
They say they got it under control quickly, but the smoke damage was extensive, and an adjacent building had minor damage from the fire.
Thunder Bay Fire Rescue says it is crucial to have working smoke detectors to catch those fires early.
