Social infrastructure and centralisation in community response and recovery from disasters

This study examines how communities in Australia respond to floods and wildfires by analysing the interaction between formal institutions and informal, community-led networks. Using interviews and social network analysis across three regions, the research shows that disasters reshape local collaboration structures, increasing both coordination and connectivity. While formal systems provide structure and resources, they often struggle under extreme conditions, making space for informal groups and local actors to step in. These community networks rapidly mobilise resources, share information, and adapt to evolving needs, demonstrating flexibility that top-down systems often lack. 

The findings reveal that effective disaster response depends on a balance between centralisation and reciprocity within networks. In more severe disasters, such as the Northern Rivers floods, highly centralised yet community-driven hubs emerged, coordinating large-scale recovery efforts while maintaining strong mutual support among actors. These networks were built on pre-existing social relationships, trust, and local knowledge rather than formal infrastructure. The study highlights that investing in community organisations and social capital before disasters is crucial, as these form the foundation for rapid, adaptive, and resilient responses when crises occur.