Floods are one of the natural disasters often experienced by people in Indonesia, especially those who live on the riverbank. The riverbank areas are identified as slum settlements that have irregular settlement patterns. People who live in flood-prone areas have a high level of danger and have different characteristics and affect levels of the community prepared in dealing with floods. The research objective was to determine the correlation between the characteristics of the community and the knowledge, attitudes, and actions of the people along the river during a flood. The research was conducted by taking samples using purposive sampling. The level of public understanding of what to do when a flood occurs is 72.58%, meaning that people have good knowledge about floods. Level of understanding of the actions that must be taken before the flood was only 45.71%. Characteristics of riverbank communities in dealing with floods have a positive correlation value. The riverbank community's understanding of floods was more based on their experiences so far with floods.