No other details were given.
The 79-year-old man was last seen in his truck Thursday around 12:30 p.m.
He had been diagnosed with a cognitive impairment, according to MCSO, so they were concerned about his safety.
What to do when someone goes missing
Thousands of people go missing every year across the United States, and there are organizations and law enforcement agencies that work to bring them home to loved ones.
The Texas Center for the Missing is an organization with Houston roots that works to educate loved ones and authorities on finding the lost.
From resources that deal with missing children to endangered adults, the non-profit organization has compiled a wealth of resources to help.
There is no 24-hour waiting period required to report a person missing, according to the Harris County Sheriff's Office.