Which item is essential for a lifeguard to have while working?

The essential item for a lifeguard to have while working is a whistle. The whistle serves several crucial functions in a lifeguard's responsibilities. It is primarily used to gain attention and communicate with swimmers, other lifeguards, or patrons in a loud environment, such as a busy beach or pool area. By using a whistle, a lifeguard can quickly signal the need for immediate attention or alert swimmers to potential dangers, such as rough water or unsafe behavior.

Additionally, the whistle is an important tool for maintaining order and ensuring safety by effectively conveying commands. In emergency situations, it can be a vital communication device to direct the actions of bystanders and coordinate a response.

While other items like flotation devices, cell phones, and first aid kits are also important for a lifeguard's preparedness and safety, the whistle is the most fundamental tool for immediate communication and ensuring a safe environment.