How to absorb rainwater – what Indian cities need to learn

For Mumbaikars, there’s a grim familiarity to the crisis unfolding in the city that has taken at least seven lives in the past five days. Relentless rain has submerged roads, inundated homes in low-lying neighbourhoods, delayed commuters, and forced educational institutes to suspend classes and examinations. The India Meteorological Department has warned of more rain over the next three days, raising fears of further flooding in the country’s financial capital.

Built on what were once seven islands, much of Mumbai is land reclaimed from the sea. Large parts of the metropolis lie only a few metres above sea level. Urban expansion has disrupted the city’s intricate hydrological network — creeks, salt pans and wetlands that used to absorb the rain before gradually releasing it into the sea. During every spell of intense rainfall, water tries to flow along the erstwhile water channels — that explains the regular inundation of areas like Hindmata, Kurla, Sion and parts of the western suburbs. After the devastating floods of 2005, the city’s administrators did initiate meaningful changes — pumping stations were installed, and forecasting systems strengthened. However, despite being revamped on large stretches, Mumbai’s drainage network is ill-equipped to deal with short but intense bursts of rainfall. The storm-water system relies on gravity to empty water into the sea. This mechanism comes apart when heavy downpour coincides with high tide, like in the past few days — the seawater rises above the drainage outfall and pushes it back.

The predicaments of Mumbai’s administrators are similar to those of their counterparts in several parts of the world — it’s increasingly becoming apparent that improving drainage systems alone does not offer security against climate vagaries. China’s Sponge City policy, adopted after the Beijing floods of 2012, tries to address this challenge by enhancing the water retention capacity of the country’s urban centres — replacing concrete pavements with permeable ones, restoring urban wetlands and creating artificial lakes to store rainwater. Planners in the Netherlands’ low-lying cities have also been innovative. Instead of only strengthening traditional flood defences, they have created everyday amenities like water squares — these collect water during episodes of extreme rain, while doubling as recreation centres during the dry season — and incentivised the construction of green roofs. Mumbai’s municipal agency, too, has lake restoration projects on its agenda. However, “blue-green infrastructure” remains largely a niche concept in most parts of India, including in its financial capital. The country’s urban centres need housing, transport, commercial districts and modern infrastructure. The task for planners and administrators is to design them in a manner that does not render cities defenceless against extreme weather.

Overall Analysis

The editorial examines the recurring problem of urban flooding in Mumbai and argues that Indian cities must move beyond conventional drainage systems to adopt climate-resilient urban planning. The article is not merely about heavy rainfall; it highlights how poor urban planning, unchecked construction, and the destruction of natural ecosystems have made cities increasingly vulnerable to extreme weather events.

The editorial opens by describing Mumbai’s familiar monsoon crisis, using examples of flooded roads, disrupted transport, and loss of lives to create a sense of urgency. The author establishes that these floods are no longer isolated incidents but have become an annual reality. The language is factual yet evocative, encouraging readers to view the issue as a systemic governance challenge rather than a natural disaster alone.

The author then explains the geographical and historical reasons behind Mumbai’s vulnerability. By referring to the city’s reclaimed land and the disappearance of wetlands, creeks, and salt pans, the editorial shows that urban development has disrupted natural drainage systems. The explanation of how storm-water drains fail during high tides combines technical detail with simple language, making a complex engineering issue easy to understand. This section demonstrates the author’s analytical approach by linking environmental degradation with infrastructure limitations.

The editorial broadens its perspective by comparing Mumbai’s challenges with those faced by cities across the world. Instead of focusing only on criticism, it introduces successful international examples such as China’s Sponge City programme and innovative flood-management techniques in the Netherlands. These examples strengthen the argument that sustainable urban planning should integrate nature into infrastructure. The use of practical global case studies adds credibility and presents solutions rather than merely highlighting problems.

In the concluding section, the editorial shifts from diagnosis to prescription. It argues that India’s growing cities cannot sacrifice environmental resilience in the pursuit of housing, transport, and commercial development. The phrase “blue-green infrastructure” represents the central idea that natural ecosystems should become an integral part of urban planning. The author ultimately calls for development that balances economic growth with climate adaptation, emphasizing that future-ready cities must learn to absorb rainwater instead of simply trying to drain it away.

Important Vocabulary (5)

1. Inundated – flooded or overwhelmed with water.
2. Hydrological – relating to the movement and distribution of water.
3. Predicaments – difficult or challenging situations.
4. Permeable – allowing water or other liquids to pass through.
5. Climate Vagaries – unpredictable and changing weather patterns caused by climate variability.

Conclusion & Tone

The editorial argues that urban flooding is largely a consequence of flawed city planning rather than excessive rainfall alone. It advocates a shift towards sustainable, nature-based infrastructure that enhances water absorption and strengthens cities against climate change. The message is that development and environmental resilience must go hand in hand if Indian cities are to withstand increasingly frequent extreme weather events.

Tone: Analytical, informative, solution-oriented, and cautiously optimistic.