It breaks water lines which increases the water problem even faster. On one side because its expensive to fix and on the other side because small leaks lead to massive water losses you don't find fast or easy.
Also broken mains lead to sinkholes: https://www.bbc.com/news/videos/cj9zex1r3kjo
Also broken mains lead to sinkholes: https://www.bbc.com/news/videos/cj9zex1r3kjo