How should lifeguards respond to a situation where a pool is about to be cleared?

When a pool is about to be cleared, blowing one long whistle blast is the appropriate response. This action serves as a clear and distinct signal to everyone in the vicinity that the pool will be evacuated or that there is a necessary safety protocol to be followed. The use of a long whistle blast ensures that the message is conveyed effectively, prompting swimmers and participants to start exiting the water in an orderly manner. This practice helps maintain safety and organization, allowing lifeguards to manage the situation smoothly and without confusion.

In contrast, giving swimming lessons would not be suitable or effective in this situation, as it would divert attention from the urgent need to clear the pool. Stopping monitoring the area would pose a safety risk, as lifeguards must always maintain vigilance for any potential incidents or needs that arise even during an evacuation. Alerting pool staff might also be a necessary action but is secondary to ensuring that immediate safety concerns are addressed first by clearing the pool. The whistle blast serves as the primary means of communication in such scenarios.