The similarly extreme version is kind of an interesting comparison, and similarly irrelevant.

The 84,000 ppm for 60 minutes is roughly the lethal CO2 concentration. Local CO2 concentration is often several times atmospheric CO2 levels. That’s clearly addressable but I suspect around 8,000 ppm atmospheric we would start to see deaths from this which is achievable from coal deposits. Reaching a fully lethal atmosphere is of course much harder.

So, I think you’re right temperature pollution at extreme levels is worse.