Abstract: During the morning of July 29, 2022, a newly hired, unacclimated employee was performing landscaping activities, including mowing, string trimming, and operating a gas-blower in a residential area, during which time wet bulb globe temperatures ranged up to 88.4 degrees Fahrenheit with a heat index of up to 103.3 degrees Fahrenheit. The employee took multiple cooling-down breaks with water in the shade and in an air-conditioned vehicle between tasks. Around 11:00 a.m., the employee, who was exposed to the heat-related hazard, stumbled and could not stand up. A coworker called emergency services, and the employee was immediately transported to a nearby hospital, where he received medical treatment. The employee was pronounced dead about an hour and a half later with a body core temperature of 110.7 degrees Fahrenheit. The employee suffered heat stroke. The sun and atmospheric conditions, including heat, created the hazard that directly harmed the employee.