On the negative side, Growing plants in wet, poorly drained soil can be quite difficult. To the extreme, very heavy rainfall followed by flooding can not only cause tremendous damage to buildings and homes, but also can kill woody and herbaceous plants. Moreover, floods disrupt normal drainage systems in cities and typically overwhelm sewer systems. Additionally, if the flood is severe enough, destruction of buildings that can contain a large array of toxic materials can cause the release of these materials into the local environment, which is not good. Floods disrupt many people's lives each year and personal tragedies due to flooding occur frequently. In my opinion, if they would choose to build cities in ways that can accommodate flooding without trying to avoid it. Attempting to go against nature is almost certainly a losing prospect in the end. Flood prevention is really something left up to cities and towns. If where you live isn't flood prone, maybe there is some other natural hazard that does affect your area that you could learn about and help with instead.