I. Introduction
Our state has been witnessing recurrent disasters in the form of floods and landslides over the past few years. During the occurrence of such disasters, user-owned devices such as mobile phones, laptops, etc., turns into a precious help to convey emergency messages and services to all the people affected. As a result, several emergency-related mobile applications have been proposed in the market but they are limited by the networking capabilities of the devices, as they are often based on short-range device-to-device communication technologies that might not be available in the emergency scenario.