What role does thermal imaging play in a fire investigation?

Thermal imaging plays a crucial role in fire investigations by helping investigators identify hot spots and areas of smoldering materials. This technology uses infrared sensors to detect heat signatures, allowing investigators to visualize temperature differences in the scene. Identifying hot spots is vital for determining potential sources of ignition and evaluating the progression of the fire. It can expose areas that may not be visibly on fire but are still at risk of combustion, thereby enhancing the safety of the investigation and ensuring that all potential dangers are addressed.

The other options do not align with the primary functionality of thermal imaging in fire investigations, as thermal cameras do not assess air quality, estimate financial losses, or record timelines of fire spread directly. Rather, their primary use is focused on the immediate thermal profile of the environment, which is essential for conducting thorough and effective fire investigations.