The usually hidden and oblivious informal social infrastructures emerge as crucial assets for relieving natural disasters that may paralyze regular functioning of formal institutions.

• 目前已有证据显示，非正式的社会结构似乎在自然灾害的防治过程中，正扮演著愈来愈重要的角色，特别是在正式组织于资源动员及整合时出现罅隙的情况下。