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In times of climate change, it is said that the marginal population shall be the most adversely affected. This article attempts to explore the state of slums in Dehradun city and their susceptibility to climate change events, especially urban flooding. Taking the case of the state capital, we attempt to identify and demonstrate how the slum population is vulnerable to climate change events in the present and the future. Following risk-hazard approach, this article identifies and distinguishes vulnerable slums, per their sensitivity toward climate-led events using geographic information system (GIS) spatial analysis. Climate change trends show increasing precipitation and temperature trends, which is in agreement with current events of such phenomena in the city. Through GIS, the slums were mapped and their proximity to streams and roads were taken into account to generate vulnerable hotspots with respect to numbers, population, and location. The article then inquires into the inclusion of such vulnerable slums in various relevant state- and national-level policies discussing challenges and issues in implementation. The article finally derives the possibilities for inclusion of such marginalized classes through ongoing Government of India missions.