A Washington state safety rule requires employers to protect outdoor workers from heat-related illness. Employers must train workers and supervisors to recognize the symptoms of heat stress and how to respond, increase the amount of water available to workers when it's hot, have the ability to appropriately respond to any worker with symptoms, and include heat-related-illness hazards in the employer's safety program.
L&I offers many online resources, such as a sample accident prevention plan, training materials for supervisors and workers, and wallet cards with safety tips. In addition, employers may request a free workplace consultation or attend a workshop.
More information and resources about outdoor heat exposure are available at http://www.lni.wa.gov/Safety/Topics/AtoZ/heatstress/default.asp.