This thesis investigates how open design can support communities affected by climate change-related flooding through the development of an accessible, low-cost, and community-oriented emergency solution. Starting from the observation of the increasing frequency of extreme weather events, particularly floods and storm surges, the research explores the role of design as a practical tool to strengthen local resilience in non-critical but highly disruptive domestic emergencies. A multi-level methodology was adopted, integrating several research tools: review of scientific literature and sector-specific books, participation in conferences on the topic, comparative analysis of international case studies on emergency management, netnographic research on online communities affected by flooding, field observations in the Copenhagen area, and qualitative interviews with both young and older residents.