Detection is a measurement decision
A thermal anomaly appears only after a reference condition, threshold, and comparison period have been chosen. Changing those choices can change which pixels are flagged.
One hot pixel can contain several surfaces
Roofs, pavement, bare ground, water, and atmospheric effects can contribute to the same observation. Spatial context matters before a source is named.
Weather belongs in the baseline
Air temperature, wind, humidity, and recent rainfall can shift surface temperature. A useful baseline should make those conditions visible rather than treating them as background noise.
Report candidates before causes
A cautious public layer can report repeated candidate patterns, observation support, and uncertainty without publishing a definitive claim about an individual facility.