LEHIGH COUNTY, Pa. (CBS) - The death of a 90-year-old man this week has brought Lehigh County’s heat-related deaths to three for the year, according to the county’s coroner’s office.

On Wednesday, Joseph Kuzmak, of Weisenberg Township, died of hyperthermia due to excessive heat, according to officials. His home had an air conditioner, but it had not been turned on. The air temperature in the home was about 100 degrees.

He was pronounced dead at Lehigh Valley Hospital at 4:35 p.m.