Abstract: Employee #1 had been hired as a laborer to tear off old roof shingles and put them in a wheelbarrow with a shovel. It was his second day on the job. The crew of three men worked from about 8:30 a.m. until lunchtime, at which time they took a 30 minute break, then returned to work. Employee #1 was wearing no shirt, only pants and boots. He was drinking water frequently. At 12:00 noon, the wet bulb globe temperature was approximately 30 degrees Celsius. At about 4:15 p.m., an employee asked Employee #1 to do something else, but Employee #1 made a grunting noise and tumbled down, falling about 30 ft from the roof to the grass. Rescue personnel arrived after some time. Employee #1 was pronounced dead on arrival at the hospital.