Crosby fire officials and Harris County fire marshals were seen investigating at the house in the 13300 block of Seaberg Road.
HCFMO said one elderly man was found dead. Deputies later confirmed that he took his own life.
The exact circumstances around his death and the fire were unclear.
If you are struggling with thoughts of suicide, or worried about a friend or loved one, help is available. Call the National Suicide Prevention Lifeline at 1-800-273-8255 [TALK], or text TALK to 741-741 for free confidential emotional support 24 hours a day 7 days a week.