What must a lifeguard do if a patron is acting dangerously in the water?

When a patron is acting dangerously in the water, the lifeguard's primary responsibility is to intervene and enforce pool rules to ensure the safety of all patrons. Lifeguards are trained to identify potentially hazardous behavior, such as running near the pool, roughhousing, or diving in shallow areas. By intervening, they can prevent accidents and injuries before they occur, thereby maintaining a safe environment.

Enforcing pool rules is crucial because these rules are established to protect everyone in and around the water. The lifeguard’s timely action can often de-escalate a situation and influence the patron's behavior positively. This proactive approach not only promotes safety but also reinforces the importance of the established guidelines to all pool users.

Failing to intervene or waiting for a supervisor could lead to serious accidents or injuries, which lifeguards are trained to prevent. Remaining passive in the face of dangerous behavior contradicts their role and training and can compromise safety for other patrons.