There was this file you could use to put fire where you wanted but the account is closed : NeoFly smokes for Microsoft Flight Simulator | MSFS
You can also install this and find in the SDK (Simobjects) smokes and fires that you can ajust (put them back on ground since they are made for chimney) to put fire where you want: We Love VFR - Region 1 for Microsoft Flight Simulator | MSFS