Paradise Police said 63 year-old Mark Lind was found alive, underneath his home around 3:00 p.m. Sunday afternoon.
He went missing between 3:00 p.m. and 5:30 p.m. Saturday afternoon.
A sergeant with the Paradise Police Department said family members were the ones who discovered Lind.
Police said the 63 year-old was recently diagnosed with dementia and has several other medical issues.
According to police Lind had removed part of the siding of his mobile home, crawled below it and then replaced the siding.
Police said he had suffered "exposure" from being out in the cold elements overnight and was taken to Feather River Hospital.
Lind did not take his cell phone or vehicle when he left his home.