Heat was a detection count, so raising the minimum-FRP slider removed most
detections and the hot spots faded to blue even where strong fires still
burned. Each detection now adds its FRP in megawatts (0.5 MW floor), so weak
fires carry little heat and filtering them out keeps strong-fire areas hot.
On the live payload, hot spots that stay yellow or hotter at >=100 MW rise
from 7% to 17% and their median heat from 0.10 to 0.38.