You can read the 18 page regulatory text here. In summary, the standard would require:

  • Heat injury and illness prevention plan: The employer must develop and implement a work site heat injury and illness prevention plan that describes all policies and procedures necessary to comply with the requirements of this standard and designates one or more heat safety coordinators. The employer must also seek the input and involvement of non-managerial employees and their representatives.
  • Identifying Heat Hazards: The employer must use either a heat index (temperature plus humidity) or Wet Bulb Glob Temperature (temperature, humidity, radiant heat and wind)
  • Triggers: Under the proposed rule issued Tuesday, OSHA would adopt two heat index triggers: an “initial heat trigger” at 80 degrees, and a “high heat trigger” at 90 degrees. The initial heat trigger  would require employers to provide drinking water and break areas that workers can use as needed. If above the initial heat trigger, the employer must provide 1 quart of drinking water per employee per hour, shaded or air-conditioned break areas and the employer must “allow and encourage employees to take paid rest breaks in the break area required by paragraph (e)(3) or (e)(4) if needed to prevent overheating.”  If employees are exposed above the high heat trigger, the employer must provide employees a minimum 15-minute paid rest break at least every two hours and implement a system for observing employees for signs and symptoms of heat-related illness
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    Note the emphasis on “paid” rest breaks. This is important, especially for piece-work where employees, for example, are paid for the number of tomatoes picked in a day.
  • Acclimatization: Employers will need to allow new and returning workers time to gradually acclimate their bodies to adjust to the heat.
  • Training: Both employees and supervisors must be trained about the heat standard.
  • Emergency Response Plan: Employers need to develop a plan to respond to workers who are showing signs or symptoms of heat illness, including how to get them emergency care in severe cases
  • Non-Discrimination: Employers are prohibited from discharging or in any manner discriminating against any employee for exercising those rights.