A water main break occurs when the pipe breaks in some way. The water flowing through the pipe then pours out of that crack or break. Although water typically continues to flow through the water main, it usually has less pressure. Depending on the cause of the water main break, the material of the pipe, and other factors, the water coming out of the pipe can cause additional damage.
The water can erode soil and roads, leading to sinkholes and creating traffic problems. Water may pour or even gush or spray out of the ground, causing flooding. If a water main break occurs near your property, the water could even cause damage inside.