Im pretty sure we have the methods required for this. If you don't know what this mod is like, then you should look it up on YouTube. Basically, the player starts a new world and has 4 days to gather resources and get a burn proof shelter set up or set up underground. On the 2 day, the grass slow starts to die. On the 3 day, the trees start to lose their leaves, 4 day, anything that is burnable and outside in the sun catches fire and lava starts to collect on the surface.
mod suggestion: Solar Apocolypse