A lifeguard typically works at a swimming pool, beach, or water park where they are responsible for ensuring the safety of swimmers and enforcing rules and regulations to prevent accidents or injuries. They are trained to respond to emergencies such as drowning, seizures, and other medical conditions and may also provide first aid or CPR when needed. A lifeguard's job is crucial in preventing water-related injuries and fatalities, and their presence is required by law in many public swimming areas.