This study applies intersectionality theory to analyze the structures and mechanisms through which climate change produces differential vulnerability among women and girls in Sub-Saharan Africa, with a particular focus on Mozambique. To this end, 369 excerpts extracted from 61 multi-source documents were analyzed through qualitative multiple coding, quantitizing techniques, and code co-occurrence pattern analysis using Dedoose, focusing on the intersection of climate-ecological context (acute coastal cyclones and floods versus chronic inland droughts) and gendered age (adult women versus girls). The analysis revealed that resource depletion, economic barriers, and gender norms formed a ‘Triad of Vulnerability,’ which manifested in divergent trajectories according to generational position and geographic context. For adult women, this emerged as a primary livelihood shock stemming from the collapse of productive foundations such as agriculture. In contrast, girls were driven into maladaptive coping strategies by extreme poverty, placing them within a ‘Triad of Risk’ in which school dropout, child marriage, and gender-based violence are mutually constituted. Child marriage, in particular, functioned as a critical turning point that blocked the return to education and amplified exposure to violence. This intergenerational transfer of vulnerability and the developmental crises disproportionately concentrated among girls were most starkly demonstrated in inland drought regions. This study elucidates the dynamics of ‘Spatialized Intersectionality,’ wherein the climate crisis is refracted differently according to generational position and spatial context. It argues that, within climate adaptation processes, the construction of intergenerational social safety nets and the fundamental transformation of gender norms must be pursued in tandem.