The increasing evidence of global warming calls on all states to enhance their adaptive capacity to deal with climate change. This paper compares the adaptive capacity of two Canadian provinces, the province of Mendoza, Argentina and the administrative region of Coquimbo, Chile in relation to the vulnerability of farmers to droughts and floods by applying the adaptive capacity wheel (ACW). It concludes that Saskatchewan and Alberta, Canada are particularly weak in terms of double-and triple-loop learning and in developing adaptive capacity in an equitable manner, probably attributable to strong climate scepticism in society and the weak economy. In the developing countries of Chile and Argentina, resources to assist with adaptation are often lacking; in Coquimbo, future learning is precarious because of information deficits in relation to data, memory, trust, and responsiveness; in Mendoza, institutions lack variety (redundancy of programs), resources, and governance processes are inadequately responsive. The paper makes contributions at the regional level by recommending that specific institutional weaknesses and lack of responsiveness be remedied by adopting appropriate missing instruments (perhaps, for example, water transfer provisions in Mendoza). New findings are made in relation to the dimensions of fair governance and learning capacity in the ACW. While learning capacity was closely linked to the dimension of leadership, the deficit of equity was closely linked to other indicators of fair governance (legitimacy, responsiveness, and accountability).