When would a guide report "The RED light is out at station _____?"

Reporting that "The RED light is out at station _____" specifically signifies that there is a need for police intervention. In many guiding systems or safety protocols, different colors of lights or signals are used to convey specific messages. A red light often indicates an emergency or a serious situation that requires immediate assistance from law enforcement or security.

In this context, the red light serves as a communication tool that alerts staff or authorities that a significant issue has arisen, thus prompting the necessary response to ensure safety and address the circumstance effectively. This procedure is critical for maintaining the well-being of visitors and for handling any urgent situations properly.

While there are other important situations described in the options, such as a lost child, an approaching storm, or a visitor needing help, they do not inherently require law enforcement involvement and can typically be managed by the guides or staff present in the cave. Therefore, the correct understanding of the significance behind the red light underlines the importance of collaboration with police in scenarios that threaten safety or require formal intervention.