Water adaptation measures tend to have positive economic outcomes in developing countries and positive environmental outcomes in developed countries . Roughly one third and one fourth of case studies on water adaptation also documents maladaptation and co-benefits, respectively . A significant knowledge gap remains in knowing if observed adaptation benefits also translate to climate risk reduction, if so, by how much and under what conditions . 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report