What should be done before entering a smoke-filled structure?

Using a thermal imaging camera to check for hotspots before entering a smoke-filled structure is a critical safety measure. This device allows firefighters to see through smoke and identify areas of high heat, which may indicate the presence of flames or embers that could pose a substantial risk. By detecting hotspots, personnel can plan their entry more effectively and avoid potential hazards, ensuring a safer approach to fire control operations.

The other options, while they may have their own relevance in a firefighting context, do not hold the priority that checking for hotspots does when it comes to making an informed decision about entering a hazardous environment. Bringing a fire extinguisher, for example, can be important, but it does not provide the situational awareness necessary for navigating through smoke. Notifying the media is not a direct action that influences immediate safety or tactical decision-making on the ground. Performing a risk assessment is essential for overall safety and planning, but using a thermal imaging camera specifically addresses immediate dangers present in a smoke-filled area.