Despite many hysterical media reports conflating global climate change with regional droughts this can not be a global effect, higher temperatures, instead, lead to greater percipation from greater water vapour production. Thus higher temperatures at lower lattitudes could result in icecap growth in polar regions increasing albedo and thermal inertia. These are just a few of the countervailing feedback effects. The bottom line is the that the climate system as whole is extremely complicated and has been self-rebalancing for literally billions of years. I seriously doubt that a few 10s of decades of burning fossils will result in an earth that was uninhabitable.
Chixculub impactor in Yucatan 65 million years ago vaporised a huge amount of carbonate rock (eg limestone) due to the particular geology of where it hit. I wonder how that compared to the amount of carbon humans have emmited over the past several hundred years from coal and burning marine algae fossils carbon (oil, natural gas).
It is clear to me that what is really driving the "climate crisis" is rent seeking by politicians, media, scientists. Special interests always love a crisis they can benefit from.