This chapter focuses on the situation of some households from Nha Phan hamlet in Cai Nuoc District that have become more financially vulnerable as a result of the agricultural and environmental shift and thus have turned to migration as a means of coping. It reveals the complex pathways that link migration choices with changing environmental conditions. It explores how those impacts and choices are linked to human security and how the lessons learned from this study can shed light on climate change-induced migration. The chapter begins with a brief overview of sea-level rise projection for the Vietnamese portion of the Mekong Delta before discussing the switch to shrimp aquaculture in Cai Nuoc District and factors that affected whole-household migration decisions that were discovered during a study of households from that district.