If your tank ball or floater is not installed correctly, it could cause the flush valve to stay open. Unfortunately, this problem is not always easy to locate. There is rarely any sound associated with this type of toilet leak as it is an internal problem.
Caption Floodwaters pour over Texas dam. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain. Water is seen flowing over the top of a dam at Padera Lake near Midlothian early Wednesday morning following days of heavy rain.
They *all* back up water behind the dam to form deep lakes. When the dam is finished, the river water quickly backs up behind the dam, flooding a large area around it. From there, what happens next depends on the purpose. Some dams generate power, some control water levels and provide flood control, some assist in navigation, and some do all three.