Cities study Tamil Nadu capital’s journey from severe shortages to greater resilience
Only a few years ago, Chennai was internationally recognised as one of the world’s most water-stressed cities.
Reservoirs had run dry, tanker queues stretched for kilometres and concerns were growing over whether the city could sustain its rapid expansion. Today, urban planners are pointing to Chennai as an example of how long-term planning can begin to reverse a seemingly impossible situation.
The city’s progress has not come through a single mega project but through a combination of measures implemented over many years.
Mandatory rainwater harvesting, restoration of lakes and wetlands, expansion of desalination capacity and increased recycling of treated wastewater have all contributed to strengthening water security.
Officials acknowledge that Chennai remains vulnerable to climate change. A weak monsoon or prolonged dry spell could still place pressure on supplies. However, they argue the city is now considerably better prepared than it was during the severe shortages experienced in 2019.
Urban development specialists say the lessons extend well beyond Tamil Nadu. Many fast-growing Asian cities face similar challenges of increasing populations, ageing infrastructure and unpredictable rainfall patterns.
Rather than responding only when crises occur, Chennai has gradually shifted towards planning for resilience.
Several Indian states are now studying elements of Chennai’s approach as they develop their own long-term water strategies. Experts believe the experience demonstrates that sustainable water management requires consistent investment over many years rather than emergency responses during droughts.
The story also has relevance for Sri Lanka. Cities such as Colombo and Kandy face growing pressure on water resources as urban populations expand.
Environmental planners say the balance between conservation, infrastructure and responsible water use will become increasingly important throughout South Asia as climate variability continues to increase.
