1 hour ago, xXx said:
Only way to decrease it is to wait and do nothing. Interestingly gamepedia says that even by lollygagging the heat map increases so I don't know how's that possible.
Well I've only seen that if something is actively going on in the chunk (or surrounding chunks, because heat does spread apparently).
I didn't watch quite closely enough, but here's what I saw so far:
1200 Day 2: M60 firing until heat was at 99.6%
2200 Day 2: heat still 99.6%
0300 Day 3: heat still 99.6%
0800 Day 3: heat had at some point dropped to 22.95%
AI was off, so no screamers spawned. It took a loooooong time to drop, and it appears to drop very quickly when it does. I really need to lower my day length to 30 minutes for easier testing (assuming this is game-time based, not real-time based).
Edit: I dunno, maybe never mind that. It doesn't seem consistent with later results (below)