Stay Out of the Heat – Understand Heat Illness Prevention Regulations


As we soar into the summer months, so does the dial on the thermometer. Recently, AgSafe participated in Cal/OSHA’s heat illness prevention network conference call and gathered some important facts to assist you with compliance.

On the call was William Krycia, Heat Program Coordinator with Cal/OSHA, who stated the top three heat related citations were as follows: failure to have a heat illness prevention plan in the field, a lack of heat illness prevention training, and a failure to provide adequate shade and water. So, with this in mind, what is required?

#1 Heat Illness Prevention Plan:

  • The plan must include the following elements and incorporate specific details as to how you will ensure that the provisions are met:
    • The designated person(s) that have the authority and responsibility for implementing the plan in the field
    • Procedures for providing sufficient water
    • Procedures for providing access to shade
    • High-heat procedures
    • Emergency response procedures
      • Don’t forget your lone workers (e.g. irrigators)
    • Acclimatization methods and procedures
  • When drafting your plan it is important to consider the size of your crew, the length of the work day, the ambient temperatures, and any additional personal protective equipment (PPE) that contributes as an additional source of heat.
  • The plan needs to be in English and also the language understood by the majority of the employees, and must be located at the worksite and accessible to employees.

#2 Heat Illness Prevention Training Topics:

  • Employee training needs to be done before an employee begins work, which could result in the risk of heat illness. Training should cover the following information:
    • The environmental and personal risk factors for heat illness, as well as the added burden of heat load on the body caused by exertion, clothing and personal protective equipment.
    • The employer's procedures for complying with the requirements including the employer's responsibility to provide water, shade, cool-down rests, and access to first aid as well as the employees' right to exercise their rights.
    • The importance of frequent consumption of small quantities of water throughout the workday.
    • The concept, importance, and methods of acclimatization.
    • The different types of heat illness, the common signs and symptoms of heat illness, and appropriate first aid and/or emergency responses to the different types of heat illness, and that heat illness may progress quickly from mild symptoms and signs to serious and life threatening illness.
    • The importance to employees of immediately reporting to the employer, directly or through the employee's supervisor, symptoms or signs of heat illness experienced by themselves or their co-workers.
    • The employer's procedures for responding to signs or symptoms of possible heat illness, including how emergency medical services will be provided should they become necessary.
    • The employer's procedures for contacting emergency medical services, and when necessary transporting employees to a point where they can be reached by an emergency medical service provider.
    • The employer's procedures for ensuring that, in the event of an emergency, clear and precise directions to the work site can and will be provided as needed to emergency responders. These procedures shall include designating a person to be available to ensure that emergency procedures are initiated when appropriate.
  • Supervisor training needs to be completed prior to supervising employees and include the following topics:
    • All of the topics covered during employee training.
    • The procedures the supervisor is to follow to implement the heat illness prevention plan procedures.
    • The protocol a supervisor is to follow when an employee exhibits signs or reports symptoms consistent with possible heat illness, including emergency response procedures.
    • How to monitor weather reports and how to respond to hot weather advisories.

#3 Adequate Shade and Water:


  • Adequate shade means blockage of direct sunlight. One indicator that blockage is sufficient is when objects do not cast a shadow in the area of blocked sunlight. Shade is not adequate when heat in the area of shade defeats the purpose of shade, which is to allow the body to cool. For example, a car sitting in the sun does not provide acceptable shade to a person inside it, unless the car is running with air conditioning. Shade may be provided by any natural or artificial means that it does not expose employees to unsafe or unhealthy conditions and that it does not deter or discourage access or use.
    • Shade needs to available when the temperature exceeds 80 degree Fahrenheit.
      • How do you know when temperatures hit 80 degrees? Cal/OSHA urges employers to not rely on your cell phone because it does not reflect the site specific temperatures. Best practice, invest in an outdoor thermometer.
    • The amount of shade present shall be at least enough to accommodate the number of employees on recovery or rest periods, so that they can sit in a normal posture fully in the shade without having to be in physical contact with each other.
    • The shade shall be located as close as practicable to the areas where employees are working.
    • Shade also needs to be available, even when the temperature does not exceed 80 degrees Fahrenheit, upon employee request.


  • Employees shall have access to potable drinking water. It must be fresh, pure, suitably cool, and provided to employees free of charge. The water shall be located as close as practicable to the areas where employees are working. Where drinking water is not plumbed or otherwise continuously supplied, it shall be provided in a sufficient quantity at the beginning of the work shift to provide one quart per employee per hour for drinking for the entire shift. Employers may begin the shift with smaller quantities of water if they have effective procedures for replenishment during the shift as needed to allow employees to drink one quart or more per hour.

While the provision for heat illness prevention may seem cumbersome, the number of heat-related worker deaths has dropped significantly, with Mr. Krycia noting there was only one confirmed heat-related death last summer.

For more information about heat illness prevention, worker safety, health, human resources, labor relations, or food safety issues, please visit, contact us at (209) 526-4400 or via email at

AgSafe is a 501c3 nonprofit providing training, education, outreach, and tools in the areas of safety, labor relations, food safety, and human resources for the food and farming industries. Since 1991, AgSafe has educated nearly 75,000 employers, supervisors, and workers on these critical issues.