Which method is effective for locating hidden fires?

The most effective method for locating hidden fires is thermal imaging. This technology allows firefighters to see temperature differences in an environment, which can indicate the presence of heat sources or hidden fires that may not be visible to the naked eye. By detecting these hot spots, thermal imaging can help in identifying areas that require further investigation or action, enabling a more efficient and effective response to potential fire hazards.

The other methods have their uses but do not provide the same level of effectiveness in locating hidden fires. For instance, a water pressure test is more focused on assessing the integrity of water supply systems rather than detecting fire; notifying someone is important for communication but does not aid in locating the fire itself, and visual inspection can reveal some signs of fire but often misses those that are concealed or not outwardly visible. Thus, thermal imaging stands out as the most reliable tool for accurately identifying hidden fires.