The book has been written based on original research work. It focuses on river flooding, vulnerability and slums. It reveals the disastrous situation of slum dwellers of Dhaka city during flood. The special feature of this book is that it is a comparative study. Two slums of Dhaka city have been chosen to determine flood vulnerability. In this regard, four factors: economic, social, susceptibility and coping capacity have been considered. Data have been collected mostly from primary as well as secondary sources. The study finds that slum people are most vulnerable to flood. It is tried to calculate the vulnerability of slum dwellers in both qualitatively and quantitatively which is time-demanding step to calculate the vulnerability of a community. It finds some surprising results which are not usually understandable for slum people. For reducing flood vulnerability of slum dwellers, several options have been proposed. This book might be useful for planners and decision makers for reducing flood vulnerability in slum areas. In addition, it would be helpful for those researchers interested in the field of ‘Disaster Management’ concerning squatter settlements.