The Air Quality Index in my town is currently 260 (very unhealthy) due to a surge in wildfires in western Canada and the northwest US. There are additional smaller fires not shown on this map at this zoom level.
From the interactive map it looks like the worst air in the world right now.
I think that’s too pessimistic. There’s no way it’d wipe us all out even if fossil fuels had continued being the only practical tech. Even at double-digit temperature increase Antarctica is quite cool, and we’ve passed through bottlenecks of only a few tens of thousands of people before. Some wartorn agrarian Antarctic civilisation would continue on.
What the shift to renewables means is that we might put the Earth into a new persistent state, but then it will stop and we have an opportunity to either just adapt or try and push it back.
It’s already predicted that we would live as species in the artic circles as that’s the only area still inhabitable with the prospected 3-4C temp rise. (as long as it’s high enough) I’m not sure if I’d want to live to see that happen.