Effective, temporary, reusable, and water-filled bladder technology that contains and diverts water, replacing sandbags, which are more expensive and labor and time intensive to deploy. FlexaPrism Dams seal the containment area via a single point of surface contact and tremendous downward pressure. After flood water has receded and the Dams are no longer required, they are drained, cleaned, and rolled up for easy storage until next use.