The Hochwasser App is a free Android application designed to help users assess flood risks for their homes due to heavy rainfall or flooding in North Rhine-Westphalia. By simply entering an address, users receive a rapid and precise evaluation of potential flood hazards. The app features various scenarios of heavy rain and flooding, alongside an innovative 3D visualization tool that helps users understand the risks better.

In addition to risk assessments, the app provides local information and contacts for over 120 municipalities for further consultation. It is user-friendly, offering clear explanations about flooding dangers. The app is continually being updated, with plans for additional features, including advice on how water may infiltrate homes and tips for prevention and property protection.