What is the role of the lifeguard during a thunderstorm?

During a thunderstorm, the lifeguard's primary responsibility is to ensure the safety of all patrons. Clearing the pool is essential because water can be a conductor of electricity, and any lightning strikes pose a significant danger to individuals in or near the water. By clearing the pool and supervising patrons indoors, the lifeguard helps to minimize the risk of injury during severe weather conditions. This action allows for a controlled environment where patrons can be monitored for safety while waiting for the storm to pass.

The other tasks listed, such as ensuring patrons are safely in the water, continuing regular patrols of the pool area, or providing swimming lessons, would not be appropriate during a thunderstorm. Ensuring all patrons are in the water contradicts their safety and undermines the lifeguard's role during dangerous weather. Regular patrols, while important at other times, also do not address the immediate need for safety during a storm. Similarly, swimming lessons should be suspended during such conditions to prioritize the well-being of both instructors and participants.