What should a lifeguard do if they notice a significant drop in the pool's water level?

A lifeguard observing a significant drop in the pool's water level should prioritize checking for potential leaks and informing management. This action is crucial because a sudden decrease in water level can indicate a safety hazard, such as a leak that may compromise the integrity of the pool or pose risks to swimmers. Prompt identification and reporting of such issues allow for immediate investigation and remedial action, which helps maintain a safe swimming environment.

Additionally, being proactive in addressing the situation helps prevent further complications, such as structural damage or creating unsafe swimming conditions that may arise from insufficient water levels. The focus here is on the safety and health of the swimmers as well as the maintenance of the facility. Waiting to report the issue or continuing to monitor the pool could lead to escalating problems, while filling the pool without assessing the situation first could mask the underlying issue.