Climate change is the single greatest threat to the livelihood, security and well-being of Pacific Small Island Developing States (SIDS). The threat is increasing at a time when the region is already facing complex geopolitical dynamics and multifaceted security risks. A range of critical climate-fragility risks are emerging in the Pacific region, and they will require greater examination, monitoring and coordinated action by various stakeholders at the national, regional and international levels. This risk brif by the Climate Security Expert Network seeks to highlight some of the most critical emerging risks that - without informed and early action - could exacerbate security challenges in the region and for its most vulnerable people. It also suggests immediate, concrete responses to these challenges. For a quick overview of the Pacific Island's climate-fragility risks, take a look at the two-pager factsheet.