What is the immediate action a lifeguard should take if a swimmer is in distress?

Using a flotation device to reach the swimmer is the most appropriate and immediate action a lifeguard should take when a swimmer is in distress. This method allows the lifeguard to maintain a safe distance from the distressed swimmer, who may be panicking or struggling, which could lead to the lifeguard themselves becoming at risk. By utilizing a flotation device, the lifeguard can offer assistance without directly placing themselves in harm's way, ensuring a safer rescue.

Additionally, reaching the swimmer with a flotation device can provide them with buoyancy, helping to stabilize their situation while the lifeguard guides them back to safety. This approach also exemplifies the principle of "reach, throw, and then go," prioritizing safety during rescues. Overall, employing a flotation device maximizes effectiveness and minimizes risk, which is crucial in lifeguard response protocols.