ABSTRACT When disasters isolate communities from external support, their members must turn to each other for mutual assistance. This study explores (1) resource management, (2) information sharing, and (3) community leadership and civic participation as dimensions of peer-to-peer sharing for more efficient distribution of local resources under “islanded” conditions. Interviews with members and leaders of three neighborhood-scale communities in Washington state revealed concerns about household preparedness and stockpiling of resources, but also the potential to lever individuals’ community knowledge, social networks, and willingness to participate. Future interventions might include enhancing place-based social infrastructure for resource and information sharing; online local databases and applications that normally maintain privacy but “unlock” important household information for community use in emergencies; and programs that help individuals access and adopt leadership and participation roles. Satisfying these requirements for successful disaster prepared ness also aligns with the goals of everyday community-building and strengthening of collective capacity.