Spotted by our colleagues over at simFlight.de, FS Active Fires is a tool, currently undergoing beta testing, which downloads active fire data from the NASA FIRMS (Fire Information for Resource Management System) website and uses it to create large area fires within Microsoft Flight Simulator X.
Currently at version 0.1.5, the beta tool communicates with FSX via Simconnect and was last updated at the beginning of November. Both the executable and source code can be downloaded here if you’d like to contribute to the development process.