The climate change which has been predicted for decades has become part of our new reality. Moreover, the effects and resulting damages and difficulties engendered by that change are also evident. Being interested in Astronomy, and living in British Columbia, some of the environmental changes caused by the climate change are at least annoying, if not definitely unhealthy. Some much more serious aspects of the climate change are hundreds of forest fires in our province alone (other areas have the same problems). People are forced to leave their houses, find them burned down, thereby incurring immense losses. More serious, some people, while fighting the fires are injured, and, sadly, some have died.
Climate changes have occurred a number of times in the past, but, it appears, not at the current rate. Humans, at whatever evolutionary stage, seem to have developed methods, physiological, biological, and thinking up solutions which allowed adaptations to changes of climate. Many humans may have lost their lives in these processes.
Evolution, in my thinking, is a random process. Most genetic and DNA alterations are unsuccessful. The successful versions continue and become more numerous and dominant. I therefore believe that some of our current human individuals have a genetic internal makeup which will allow their adaption and increase their biological dominance under the new climatic conditions.
As humans, we also have developed a very complex system of dealing with climate change: it is called space travel. Humans have walked on the Moon and have returned to Earth. Current efforts aim at permanent settlement on the Moon, and even Mars. That means getting away from current dangers on Earth and facing new, more likely much more powerful dangers in space.
Humanity is very adaptive. These current efforts will likely result in success sometime in the future. We'll possibly spread to wider space presence within suitable environments created by us. There is going to be no "hell". So, if someone annoys you in that future, recommend that person go to Venus.