A flood occurs when water overflows onto land that is usually dry. This can happen due to heavy rain, melting snow, or the breaking of a dam. Floods can cover streets, homes, and fields, causing damage and making it difficult for people to move around. They can happen quickly, sometimes with little warning, and can be very dangerous. During a flood, rivers like the Mississippi or Amazon can rise above their banks, leading to widespread destruction. Communities often prepare for floods by building levees or creating drainage systems to help manage excess water. Understanding floods is important for safety and planning.