They talk about river inter-linking projects, rivers in South India are non-perennial unlike the ones in the North (source from Himalayan glaciers). Idea is fine in a country which suffers floods in one region and severe drought elsewhere but it will take many decades to implement and there haven't been many studies about the environmental impact. I am sure that this idea will be stalled, problems like land acquisition, environmental/tribal NGO protests, politics etc are inevitable and a flawed, messy democracy like India can never take swift action (like say China). Even if they manage to lay out the plans it will be a massive civil engineering project, don't know whether we have the ability to pull it off.
Our immediate hope is to construct as many rainwater harvesting systems as possible in the city (every single house, school, hospital, office, govt building), desilt existing waterbodies and reverse illegal construction (waterbody/wetland encroachment mafia is hand in glove with our state's politicians), change agricultural patterns to replace the water intensive crops, shut down water intensive industries, better reuse/recycling process (stiff challenge in third world countries), increasing green cover etc. Politicians here are increasingly talking about desalination plants but again that could be super costly. I guess these are some options on the table.
