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We live in a digital era where the global community relies on Information Systems to conduct all kinds of operations, including averting or responding to unanticipated risks and disasters. This can only happen when there is a robust information exchange facilitation mechanism in place, which can help in taking quick and legitimate steps in dealing with any kind of emergent situation. Prior literature in the field of information assurance has focused on building defense mechanisms to protect assets and reduce vulnerability to foreign attacks. Nevertheless, information assurance does not simply mean building an impermeable membrane and safeguarding information, but also implies letting information be securely shared, if required, among a set of related groups or organizations that serve a common purpose. This chapter will revolve around the central pivot of Information Sharing. Further, to study the relative significance of various information dimensions in different disaster situations, content analyses are conducted. The results hence obtained can be used to develop a prioritization framework for different disaster response activities, thus to increase the mitigation efficiency. We will also explore roles played by few existing organizations and technologies across the globe that are actively involved in Information Sharing to mitigate the impact of disasters and extreme events.