How are "hot spots" detected during mop-up operations?

During mop-up operations, detecting "hot spots" is crucial for ensuring that all sources of heat are adequately addressed to prevent potential flare-ups. The most effective methods for identifying these areas involve advanced techniques such as visual inspections, thermal imaging, and utilizing handheld infrared sensors.

Visual inspections allow personnel to identify areas that may still be smoldering or are unusually warm, while thermal imaging provides a more accurate method of detecting heat signatures that are not visible to the naked eye. Handheld infrared sensors further enhance this capability by pinpointing areas of elevated temperatures, enabling teams to focus their efforts on specific spots that could reignite.

This combination of methods ensures a thorough assessment of the terrain after a fire, allowing responders to take appropriate action to fully extinguish any remaining heat sources, which is essential for the safety of the area and to prevent future incidents. Other options do not effectively contribute to the detection of these critical hot spots as they rely on methods that lack the precision or thoroughness needed in these operations.