City of Knoxville Fire Department responded to a house fire in the Holston Hills community at Riverplace Drive at approximately 6:30 on Sunday night.
Firefighters said there was one person inside the home at the time of the fire, and crews were able to pull him safely from that residence.
Emergency responders transported the victim to the hospital for severe disorientation.
The owner was away at the time of the blaze, and a firefighter said the victim was the owner's friend.
Authorities still don't know what caused the fire. The investigation continues into how the blaze started.