Major flooding events can significantly impact multiple nations within the same river basin, underscoring the critical importance of flood control, particularly in transboundary regions. For example, France and Germany share a portion of the Rhine River basin and have collaborated in risk management, leveraging distinct approaches. Despite advancements in the understanding of flood risk management, there are gaps in the implementation of effective strategies. This study investigated how flood considerations are integrated into the planning process through a comparative approach using case studies. This study evaluates the efficacy of current legal and institutional frameworks for deluge risk management in transboundary river basins through the analysis of secondary data, concentrating on three primary criteria: (1) legal and institutional frameworks, (2) National Strategies for Flood Mitigation, and (3) Cooperation Across Borders. This study illuminates essential elements of disaster resilience and governance, offering important insights for decision-makers and practitioners. It highlights the role of the spatial planning system, the necessity of effective coordination, and the development of international collaboration to address intricate multilateral issues. Initially, spatial planning was crucial for achieving national flood mitigation goals. Furthermore, decentralized and community-focused planning is essential. Therefore, it is crucial to ensure effective coordination among stakeholders. Both systems emphasize a comprehensive strategy that integrates non-structural measures with the current infrastructure. Finally, international cooperation is transitioning from voluntary to legally binding arrangements to address global flood challenges through institutional reforms.