Letter Carrier Kirk Miller was delivering mail on an August day last year in Danville, PA, when he came upon a customer facedown in a yard.
Miller rushed to aid the man, who had passed out and hit his head.
The Postal Service employee immediately called 911 and, suspecting heat-related illnesses, shielded the man from the sun.
Paramedics soon arrived to provide medical treatment.
The customer recovered from the incident.