The present study is to know the role of organizations and make an assessment on their assistance regarding preparedness and emergency response of flood disaster affected people. This study has used a mixed-method approach. Flood-affected people were the respondents to evaluate the organizational role. The study reveals that before the flood in 2017 to minimize the loss and damages, the GOs play a very effective role concerning the arrangement of preparatory meetings and preparing shelter centers, and NGOs play a very useful role in making arrangements for awareness-building training. During the emergency period, the GOs played a comparatively better role in providing CI sheets, agricultural assistance and cash money as relief for establishing housing facilities and emergency support. The NGOs played relatively a better role in providing food, water, clothes, medicine, etc. This study put forward complications such as limited sanctions, disruption of communication, lack of awareness of sufferers, and overlapping. The findings of this study would be a significant for the disaster policymakers, and civil societies. © 2020, The Author(s).