Great place to start with flames.
>This won't be a nice change of pace for your climate. It will be a mass extinction even humans have never experienced. It's obscene even.
The science clearly says that isn't the case at all. Feel free to reference IPCC RCP8.5 scenarios where we magically find extremely more fossil fuels and burn those as well. No extinction is expected even in those scenarios.
https://en.wikipedia.org/wiki/Eocene#Climate
The eocene was approximately 14celcius warmer than it is today and life thrived.
https://en.wikipedia.org/wiki/Last_Interglacial
During the last spike, the eemian, it was about 2 celcius warmer than today. Roughly 100,000 years ago, and that's roughly all we do expect to happen now. Life was thriving.