What is an appropriate response to a potential toxic gas casualty?

Setting boundaries is crucial in response to a potential toxic gas casualty because it helps to ensure the safety of both the affected individual and others nearby. Establishing boundaries prevents additional exposure to the toxic gas and keeps bystanders at a safe distance, minimizing the risk of more casualties. This approach allows for a controlled environment where emergency procedures can be put into place without further harm.

While immediate assistance to the individual may seem like a helpful response, it can put the rescuer at risk if the gas is still present and active. Covering the area or ignoring the situation are not appropriate actions as they do not address the immediate risks associated with toxic gas exposure. Setting clear boundaries allows trained personnel to assess the situation and respond effectively while also protecting others from potential hazards.