[starlust2]

If climate change reaches the tipping point where clouds cannot form then we probably won't be seeing much rain anywhere.

[PittleyDunkin]

Humidity can still hit 100% though, yea?

[starlust2]

I'm not sure about that but in that scenario polar regions would be 75-85F and life would be very harsh just about everywhere else. The one period in time where temperatures were that high, the Paleocene–Eocene Thermal Maximum, diversity plummeted, mammals were smaller and migrated to higher latitudes.