What is the recommended action if a lifeguard witnesses a patron diving into shallow water?

The recommended action for a lifeguard witnessing a patron diving into shallow water is to immediately blow the whistle to prevent potential injury and educate the patron about safety rules. This response is crucial because it prioritizes the safety of the patron who might not be aware of the dangers associated with diving into shallow water, such as the risk of serious injury.

By blowing the whistle, the lifeguard effectively signals attention and creates an immediate intervention to halt the dangerous behavior. Following the whistle, educating the patron about safety rules reinforces the importance of being aware of warning signs and safe practices near water. This proactive approach not only protects the individual but also reinforces a culture of safety for all patrons at the facility, ultimately reducing the risk of accidents.

The other options lack the proactive measures necessary for ensuring safety. Ignoring the behavior or waiting to see if the patron gets hurt does not address the immediate hazard and could result in severe consequences. Consulting with other patrons before taking action creates unnecessary delays and could put the patron at risk. The lifeguard's role is to act decisively in the interest of safety rather than to defer action based on external opinions or observations.