It's difficult to say. Part of the problem is that the list of potential adaptation measures is, frankly, enormous. Perhaps it's best not to do that in a very top-down sort of way: to facilitate, to encourage, and to enable, and where the poorest and most vulnerable sectors of the economy or the society are at risk, to provide some help--but generally speaking, to facilitate rather than to financially support adaptation.
The corollary, of course, is that failure to mitigate is going to increase the cost of adaptation in the long run enormously.