What is the first step a first responder should take upon arriving at a CBRN incident scene?

The first step a first responder should take upon arriving at a CBRN incident scene is to conduct a scene safety assessment. This is crucial because the nature of CBRN (Chemical, Biological, Radiological, and Nuclear) incidents often involves hazardous materials that can pose severe risks to responders and victims alike.

By assessing the scene, first responders can identify any immediate dangers, such as toxic substances, potential contamination, and environmental hazards. This process also allows them to determine the safe distance to maintain from the incident while planning further actions.

After ensuring their own safety and understanding the situation, responders can then communicate effectively, secure the perimeter, and provide care to casualties safely. Prioritizing a scene safety assessment ensures that all subsequent actions are taken with the necessary precautions in place, reducing further harm to victims and responders.