Evaporation of sweat from skin is the body’s primary mode of temperature regulation on hot days. Clothing can impact heat and sweat production, as well as the rate of evaporation, so clothing decisions are important to prevent heat stress.
Photo credit: Joe Proudman , UC Davis Western Center for Agricultural Health and Safety
Choose lightweight, loose-fitting clothing made of a breathable fabric like cotton which allows sweat to evaporate and air to move across the skin, cooling the body. Choose light-colored clothing, which reflects heat, and a wide-brimmed hat to shade around the head.
Generally, less clothing is desirable in hot environments, except when the air temperature is greater than 95°F or a person is working in the direct sun. In these cases, covering exposed skin can reduce the risk of heat stress.
Personal protective equipment like gloves, respirators, and coveralls can significantly increase metabolic heat production, reduce evaporation of sweat, and increase the risk of heat illness. Schedule all tasks requiring PPE for cooler times of day such as morning and evening.
