1. There have been a few unfortunate incidents in the recent past where tourists/locals in the catchment area of a river were caught unware of an impending flash flood/release of water from dams of Hydro Projects upstream. This led to unfortunate and unnecessary loss of valuable human lives. 2. Presently, individual Hydra Projects are spreading awareness about impending release of water in the catchment area to locals in that specific area through SMS. 3. District administration has cordoned off access to the river catchment and Public Announcement vans are deployed in the local area before release of water from dams. 4. Announcement and early warning needs to be automated and without manual intervention to make it more effective. 5. This shall also make the hydro-sector more people friendly and caring for local lives and resources and shall increase acceptability of the future hydro projects simultaneously improve perception of Hydro sector. Possible approach to solve the problem: 1. There could be a central database connecting all hydro power stations (HPS) in the country, where information before release of water from dams of all projects would be consolidated. The HPS would need to enter data about release of water well in advance to this central database/repository. 2. Telecom solutions may be developed to send warning SMS to all mobile phone users in the area/river basin of HPS which going to release water and downstream in the river basis, based on real time information collected from telecom operators as to the number of users being served by mobile towers located in the area. 3. The warning SMS should be sent to all users identified above, overriding the DND registries. 4. All-weather Public-Announcement systems may be used/developed based on Internet of Things (IoT) and placed above electricity poles/other such infrastructure near the river basin. They may be connected through OPGW (optical fibre composite overhead ground wire) cables wherever available or may work on wireless systems to be more efficient. 5. The PA systems should be connected with the central database and start warning announcements automatically without manual intervention. 6. Any other novel approach to solve the problem is also welcome. Possible scalability and uses ink the future: 1. An IoT for all buoys measuring river measuring river discharge data may be created and linked together. On sudden increase in water discharge in any of the buoys, warning signals may be relayed to all PA systems downstream to prevent loss of life and infrastructure during flash floods /cloudbursts. Such information could also be gathered through satellite/space technology. 2. This system may also be expanded to irrigation projects and flood warning of all kinds. 3. The system must be scalable for use with advanced space technology and satellite data along with physical scalability of deploying increasing number of buoys and PA systems. 4. The IoT of buoys may also be used to collect all sorts of hydrological/ discharge data for recording and forecasting.