Not sure on the coding capabilities (or if it's been said)
-What about a fire hydrant or sprinkler system where if placed, fire has a 50% chance of going out. Or something to that effect.
I had this same idea earlier today because fires in RimWorld are the bane of my existence.
Sprinkler system would be a 1x1 placeable structure; it has an area of effect, like sun lamps, and requires power, but only 100 W. Actively drains fires, but a new fire could start (boomrat, molotov cocktail) and they make firefighting 2x more effective.
OR
Sprinklers as a research item / base upgrade. Makes firefighting 250% more effective in covered rooms (no placeable, just an upgrade.)