Climate change has increased the frequency of cyclones and floods in Bangladesh in recent decades. In response, the country has developed various policies and programs for disaster risk reduction and emergency preparedness in climate-vulnerable coastal areas. These have greatly minimized the impact on marginalized populations and ensured the livelihood and food security of millions of people. Community-engaged networks are particularly innovative and effective parts of this process. This study analyses the national- and local-level disaster management frameworks in Bangladesh based on site visits and conversations with officials, community organizers and other stakeholders. It documents how grassroots initiatives are designed and implemented in climate-vulnerable communities in Bangladesh. The findings highlight systems that are decentralized, community-based, innovative, efficient, and cost-effective. The best practices and lessons learned summarized in this chapter offer guidelines for replication in smaller coastal communities in other developing and developed countries around the world.