Last updated:
Twenty-one years after the devastating 26/7 floods in Mumbai, the city has upgraded infrastructure, but frequent waterlogging raises questions about monsoon preparedness.
Twenty-one years after the devastating 26/7 floods, despite major infrastructure upgrades, Mumbai continues to grapple with recurring monsoon waterlogging. (Images: AFP/File)
21 years after Mumbai 26/7 floods: On 26 July 2005, Mumbai witnessed one of the worst urban flood disasters in the history of India. In a span of about 24 hours, the city recorded 944 mm rainfall, including about 644 mm rainfall in a 12-hour period, affecting its drainage system and bringing India’s financial capital to a standstill.
Roads turned into rivers, suburban railway services were halted, flights were disrupted and thousands of people were stranded across the city. Many low-lying areas remained submerged for days as swollen rivers, blocked drains and high tides added to the crisis.
Read more: Mumbai 26/7 floods: 21 years later, powerful photos of 2005 floods
The disaster exposed Mumbai’s vulnerability to extreme rainfall events and raised urgent questions about urban planning, drainage capacity and disaster preparedness.
Casualties: Hundreds of people lost their lives
The 26/7 floods killed over 500 people in Mumbai and surrounding areas, with many of the deaths occurring due to drowning, lightning, landslides and building collapses. Thousands of homes were damaged and lakhs of passengers were left stranded.
The scale of the disaster also revealed how dependent Mumbai was on its transport network and how quickly normal life could collapse if critical infrastructure failed.
Why was there such a bad flood in Mumbai?
Several factors combined to produce unprecedented flooding:
- Excessive rainfall in a short period: The intensity of the rains overwhelmed Mumbai’s storm water drainage network, which was designed for very low rainfall levels.
- Old Drainage System: The city’s drainage infrastructure struggled to keep pace with rapid urban expansion. Many drains were unable to carry excess water during intense rainfall.
- Loss of natural flood absorption areas: The disappearance of wetlands, mangroves and open spaces reduced the city’s ability to absorb and manage excess rainwater.
- Mithi River Crisis: The Mithi River, which plays a vital role in carrying storm water to the sea, became highly polluted and disrupted due to encroachments, affecting its flow during heavy rainfall.
- High Tide Effect: The timing of heavy rainfall combined with high tides prevented rainwater from draining rapidly into the sea, worsening flooding.
Mumbai’s comeback after 26/7
The disaster prompted authorities to take several measures aimed at improving flood management.
Brihanmumbai Municipal Corporation’s Stormwater Drain Upgrade
Mumbai launched the Brimstowad (Brihanmumbai Storm Water Disposal System) project to improve drainage capacity. The project focused on upgrading drains, pumping stations and flood-prone areas.
However, implementation has progressed slowly over several years, with challenges related to funding, land availability and urban constraints.
Flood control pumps and infrastructure improvements
The city installed additional pumping stations at vulnerable locations, including areas near the coast, to help drain accumulated water during heavy rains.
Mithi River Restoration Effort
After 26/7, increased attention was paid to cleaning and widening of stretches of the Mithi River, improving its capacity to carry storm water.
Better weather forecasts and alerts
Mumbai has also improved its weather monitoring systems with more detailed rainfall forecasts, emergency alerts and disaster response coordination.
21 years later: Why does Mumbai still flood every monsoon?
Despite improvements, flooding remains a recurring problem. Every monsoon, heavy rains bring up familiar images of flooded roads, stranded vehicles and disrupted suburban train services.
Mumbai’s challenge today is different from 2005. The city may be better equipped to respond, but increasing rainfall intensity, rapid urbanization and climate-related risks are testing its resilience.
Same problem every year: Mumbai’s waterlogged hotspots
During heavy rains, there is often a problem of waterlogging in many areas.
- Hindmata, Dadar: One of the most identified flood-prone places in Mumbai, Hindmata faces regular water accumulation due to its low-lying geography.
- The area has seen improvements through work on pumping systems and infrastructure, but heavy rains can still overwhelm drainage networks.
- Sion Circle and Kings Circle: These low-lying areas often experience waterlogging during heavy rains due to drainage pressure and excessive runoff from surrounding areas.
- Kurla and limekiln: Located near the Mithi River basin, parts of Kurla and Chunabhatti remain unsafe during intense rainfall.
- Andheri Subway: Andheri Subway is one of the most visible monsoon problem spots in Mumbai, often getting flooded during heavy rains and affecting traffic movement.
- Milan Subway, Vile Parle: This underpass has historically faced flooding due to its low height and heavy water logging.
- Chembur and Govandi: Many areas in East Mumbai experience frequent waterlogging due to drainage challenges and rapid urban growth.
- Malad, Kandivali and Borivali: Waterlogging is often reported in parts of Mumbai’s western suburbs during intense monsoons due to increased construction and pressure on existing infrastructure.
Climate change: a new challenge for Mumbai
Experts are increasingly linking extreme rainfall events to changing climate patterns. Mumbai’s monsoon is becoming more unpredictable, with intense rainfall occurring in short periods.
For a coastal city built around reclaimed land and dense development, managing sudden rainfall events remains a major challenge.
The question now is not just whether Mumbai can handle another 944 mm rainfall event, but also whether it can adapt to more frequent extreme weather conditions.
Mumbai’s resilience: lessons from 26/7
The 26/7 floods also revealed the strength of the people of Mumbai. Strangers helped stranded travelers, residents opened homes to those stranded outside, and volunteers provided food and aid during the crisis.
The spirit of cooperation that emerged during the disaster became one of the defining stories of Mumbai’s recovery.
Is Mumbai ready for the next 944 mm deluge?
Twenty-one years after 26/7, Mumbai is better prepared than it was in 2005. The city has improved forecasting, emergency response and flood management infrastructure.
However, repeated waterlogging shows that preparations are still a work in progress. The growing population, changing rainfall patterns and pressure on urban infrastructure means Mumbai cannot rely solely on emergency response.
The next major rainfall event will test whether the city’s long-term investments have created genuine resilience or whether Mumbai will once again struggle against the forces of nature.
The memory of 26/7 remains a warning and reminder that preparations for a city built around the sea should never stop.
About the author
Essay: Vinod is a seasoned journalist with nearly three decades of experience. He specializes in covering events and festivals and running SEO-focused content for News18.com. Tech-savvy and collaborative…read more
read more
