Kansas City police blame heat and a balky ankle monitor for the death of a 75-year-old man who walked away from his assisted living facility.

Authorities say George Macias suffered from Alzheimer’s disease. He walked away from the Cherry Hills Nursing Home early Sunday. A search commenced, and about nine hours later authorities found his body in a ravine behind a home on NE Barry Road.

Temperatures topped 100-degrees Sunday.

Macias wore an ankle monitor, but the device apparently malfunctioned.