If we cannot stop climate change in time, how to mitigate the effects?

How can we adapt?

If we look at the current performance towards going towards a significant reduction of emissions and we assume that we will not accelerate the efforts, hence, the climate will change dramatically within the next decades.

What would we need to start doing on a governmental level in order to anticipate the consequences and mitigate them in the future?

I am thinking of consequences like droughts, climate migration, perhaps even famines and heat weaves.