This paper will reflect on flood warning telemetry and data collection ICT systems from the mid 1980s to present and moving forward. It will highlight the key technologies and systems developed and in development over the last couple of decades. There has been a steady progression within the Bureau of Meteorology to move from manual and localised systems to highly available enterprise class automated systems. The advancements achieved have been possible through the success of local and state agency collaboration, internal development and customisation of systems through the enhancement of technology from commercial suppliers and the acquisition of technologies from international hydrological agencies.