Water is a prerequisite for life. Water can also be a problem through heavy rain causing floods and destruction. In this paper we will describe two ongoing projects where Ericsson is participating to develop digitalized water-related monitoring solutions. One project relates to real-time rain detection through telecommunication microwave networks and the second project is the development of an IoT-based real-time water quality monitoring solution for smart cities. We will also elaborate on the opportunities and positive impact, as well as challenges and needs for the full integration of such solutions in cities.