What action should be prioritized when dealing with a hazardous materials incident?

Prioritizing the action of ensuring safety and control during a hazardous materials incident is vital because it establishes a foundation for all subsequent actions. When first responders arrive at the scene, their primary obligation is to guarantee their own safety and that of the public. This includes identifying potential hazards, establishing a safe perimeter, and taking necessary precautions to avoid exposure or further complications.

Once safety and control measures are in place — such as proper protective equipment, establishing command, and outlining evacuation zones if needed — responders can then assess the situation more effectively. This allows them to prioritize which areas need evacuation, determine the safest cleanup procedures, and manage the incident efficiently.

By focusing on safety and control first, responders can then make informed decisions on appropriate actions, preventing further danger to individuals and minimizing the potential impact on the environment. Without this critical initial step, efforts to cleanup, evacuate, or assess hazards could lead to chaos and potentially exacerbate the situation.