South Asia will be among the regions hardest hit by climate change. Higher temperatures, more extreme weather, rising sea levels, increasing cyclonic activity in the Bay of Bengal and the Arabian Sea, as well as floods in the region’s complex river systems will complicate existing development and poverty-reduction initiatives. Coupled with high population density levels, these climate shifts have the potential to create complex environmental, humanitarian, and security challenges. India and Bangladesh, in particular, will feel the impacts of climate change acutely. The Center for American Progress examines this vulnerable nexus in the latest installment of our Climate-Migration-Security series.