During heat waves when temperatures soar above 90 °F (32 °C), it is recommended that:

In the context of heat waves, especially when temperatures exceed 90 °F (32 °C), the implementation of a "buddy system" or having a supervisor on-site is crucial for ensuring worker safety. This approach allows for continuous monitoring of employees' conditions, providing immediate assistance if anyone shows signs of heat-related illnesses such as heat exhaustion or heat stroke. The "buddy system" encourages workers to look out for one another, enhancing the likelihood of recognizing symptoms early and facilitating prompt intervention.

Having supervision and peer support creates a safer work environment by fostering communication about hydration needs, breaks, and fatigue levels, which are essential in high-temperature conditions. It helps maintain a vigilant watch over workers, ensuring their well-being during strenuous activity in the heat.

In contrast, the other options lack the proactive approach necessary for addressing heat-related risks. For instance, encouraging workers to rush through tasks, replacing shaded areas with water coolers, or postponing aid until an emergency arises can lead to serious health consequences. Hence, Option C emphasizes preventive measures that align with the best practices for worker safety in high heat conditions.