Texas man dies of heat stroke in Utah park while spreading father's ashes

Texas man was on a trip to spread his father's ashes in the Sierra Nevada region.
He likely became disoriented from heat, dehydration and high altitude in Arches National Park.
His body was found off-trail with an empty water bottle.
Temperatures were over 100 degrees Fahrenheit when he died.
Authorities believe his medication may have contributed to dehydration.