There was an excellent allegory for this from Tamino many years ago that stuck with me. For those not in the know, he’s a statistician who works with climate scientists (amongst other things) like Professor Stefan Rhamstorf

https://tamino.wordpress.com/2016/02/03/how-to-destroy-a-megalopolis/

In fact I did it every day. One large pot of boiling hot water. The idea wasn’t to kill all the ants, or to eradicate their megalopolis in one crushing blow. The idea was simply to make it too costly, in terms of energy and time, for their complex of ant cities to be sustainable.

It worked.

After about two weeks, the ants were gone. Completely. I believe they just couldn’t stay there any more, it was just too difficult with such regular demands on repair. I don’t know whether the megalopolis died out, or they moved to a different location. But any way you look at it, I succeeded in destroying their megalopolis, because amid the continual assault of disasters, they simply weren’t able to keep up.

This is what can happen to us. Global warming isn’t going to come in one astounding assault and kill us all with one blow. It’s just going to make survival harder — a lot harder — with regular assaults like floods, droughts, heat waves, killer storms.