To prevent heat-related illnesses, it's crucial to have a comprehensive heat illness prevention plan in place [1]. Here's what your plan should include:

1. Training: Provide thorough training to employees on heat exposure hazards and preventive measures [1]. This training should cover how to recognize dehydration symptoms and respond to suspected heat-related illnesses [1]. Make sure the training is easy to understand and allows for employee feedback [1].
2. Water: Ensure that there is enough cool, potable water is available in work areas [1]. Encourage employees to stay hydrated by drinking water frequently [1].
3. Rest: Provide sufficient shaded or climate-controlled areas where employees can rest and cool down [1].
4. Rest Break Schedule: When the heat index reaches 90 degrees Fahrenheit or higher, implement a heat illness prevention rest break schedule [2]. You can design your own schedule or use examples from NIOSH or Oregon OSHA [2].
5. Acclimatization: Implement acclimatization procedures for new employees or those returning from extended absences to help them adjust to working in the heat [1].

Your plan should be written and accessible to employees and Oregon OSHA upon request [1].