Global warming appears to have shifted into a faster gear. After removing the effects of El Niño, volcanic eruptions, and solar cycles, researchers found that the planet has warmed at roughly 0.35°C per decade over the past ten years, compared with just under 0.2°C per decade from 1970 to 2015. The acceleration, which becomes visible around 2013 to 2015, appeared across five major global temperature datasets with more than 98% statistical certainty.
Vast current areas become arid but vast areas in Siberia and Canada become arable. Very bad but not extinction for humans. Likely extinction for many species though.
None of that thawed soil will be worth a damn for growing at any scale. Like yeah there will be areas that are more or less hospitable but large scale agriculture will not recover