Disaster is inevitable, and may strike the mankind any moment, anywhere. The after-effect of a disaster is destruction - of lives (human as well as non-human), properties and infrastructures. To mitigate the post-disaster effects of a large-scale disaster is to ensure immediate response (rescue, relief and evacuation, if needed) at the right moment and at the right place. The above demand of the situation may be provided only if a channel for exchanging information between the affected community and the persons in charge of disaster risk mitigation and reduction could be established. This chapter describes novel strategies and their implementations that may be used for collecting on-site situational data in real time for preparing "localized" crisis maps that may carry more relevant information of the disaster-affected site. Incorporation of such a tool, as part of public safety network, may enhance the usefulness of such networks to cater the stakeholders better serving the affected community even after large-scale disasters.