There are some causes and effects of flood in Indonesia. The first causes is lack of awareness to throw the rubbish into the bin. People usually throw the rubbish in the street or river. As a result, these rubbish can fill the water pipe under the street and it make the water cannot flow fluently. The second causes is many irresponsible parties perform illegal logging action. They cut and take the wood from the trees without care about surrounding environment. Because of that, when the rain season is coming, the rain water cannot be absorbed by the root. Therefore, every people should care about environment and keep the cleanliness.