If a person is lying in a puddle and not breathing, what is the appropriate first step?

The appropriate first step when encountering a person lying in a puddle and not breathing is to ensure the scene is safe and secure before providing any medical assistance. Isolating and securing the scene is crucial because it helps protect both the rescuer and the victim from any potential dangers, such as electrical hazards, traffic, or other hazards present in the environment. This security allows responders to focus on the victim without additional risk to themselves or bystanders.

Once the scene is secure, the next steps would involve checking for responsiveness and calling for emergency services if needed, as well as determining if CPR is required. Therefore, while providing immediate care is important, prioritizing safety and securing the scene serves as the foundation for effective and safe emergency response in such situations.