This research analyzes the impact of the 2021 atmospheric river events in British Columbia, particularly in Sumas Prairie, as a catalyst for policy change in flood management. The study identifies how these events heightened public and political attention, leading to shifts toward collaborative watershed governance, enhanced flood risk awareness, and the integration of long-term resilience thinking into policy frameworks. Key findings include the recognition of fragmented governance structures and the need for cohesive strategies that encompass disaster risk reduction and climate adaptation. The research underscores the importance of leveraging post-disaster periods as opportunities to implement proactive measures, moving beyond traditional recovery approaches to build sustainable and resilient communities. By examining the policy responses following the 2021 floods, the study provides insights into effective governance models and strategies that can be applied to future disaster preparedness and climate adaptation efforts.