River-draining cities and endangered deltas

Bangladesh is once again confronting one of the worst monsoon disasters this year. Yet this is not another familiar story of floods confined to remote villages. This time, the disaster has engulfed both the country’s vulnerable rural regions and its capital city, exposing deep structural weaknesses in the way Bangladesh manages its rivers, cities and climate risks.

More than a week of relentless rainfall, flash floods and landslides has devastated Chattogram, Cox’s Bazar, Bandarban, Rangamati, Khagrachhari, Moulvibazar and Habiganj. At least 51 people have lost their lives, including many Rohingya refugees in Cox’s Bazar, while more than one million people have been displaced. Homes, croplands, roads and public facilities have been submerged, leaving countless families dependent on emergency relief.

At the same time, Dhaka experienced its heaviest rainfall of the season, recording up to 97 millimetres within 24 hours on July 13. Major commercial and residential areas-including Dhanmondi, Mohammadpur, Mirpur, Motijheel, Banani and New Market-were paralysed by knee-deep water. Bangladesh witnessed an extraordinary reality: the floodplain and the megacity drowning together.
Behind the statistics lies a profound humanitarian crisis. Thousands of families have lost their kitchens, food supplies and safe shelter. Many spent nights on rooftops, embankments and roadsides under makeshift plastic coverings. Health centres in several flood-hit districts were themselves inundated, depriving people of medical care precisely when they needed it most.

Perhaps the most heartbreaking tragedy unfolded in the Rohingya camps of Cox’s Bazar, where landslides triggered by heavy rain on deforested hills killed refugees, including children and teachers.The disaster revealed how environmental degradation and fragile living conditions continue to expose the world’s most vulnerable displaced population to avoidable risks.

The armed forces, local administration and humanitarian organisations have mobilised rescue operations, but damaged roads, power failures and communication breakdowns have slowed relief efforts. The scale of the disaster once again demonstrates that emergency response alone cannot compensate for weak long-term preparedness.

Dhaka’s crisis deserves particular attention because it is largely artificial. Waterlogging in the capital is no longer simply the result of unusually heavy rainfall. It is the predictable outcome of decades of poor urban planning, unchecked encroachment and environmental neglect.

Studies show that since the preparation of Dhaka’s Detailed Area Plan, the city has lost thousands of acres of designated floodplains and water retention areas. Green spaces have steadily disappeared while canals that once carried stormwater to surrounding rivers have been encroached upon, filled or clogged with waste. As wetlands vanish beneath concrete, rainwater has nowhere to drain.

The consequences are now visible every monsoon. Commercial centres grind to a halt, transport collapses, and businesses suffer heavy losses after only a few hours of rain. Dhaka’s transformation from a riverine city into a vast concrete landscape has also intensified urban heat, making the capital increasingly unhealthy and less liveable.

The damage extends far beyond flooded streets and damaged crops. Farmers who lose a harvest do not merely lose produce; they lose the investments made through loans taken for seeds, fertiliser, irrigation and labour. Without institutional protection, a single flood can trap a family in debt for years.
Livestock losses further weaken rural economies, while disruptions at Chattogram Port and major transport corridors threaten national supply chains. Delays in moving raw materials and exports affect industries across the country, particularly the ready-made garment sector. Food shortages and transport disruptions eventually lead to higher prices, even in areas untouched by floodwaters.

Bangladesh has earned global recognition for reducing disaster-related deaths through early warning systems, cyclone shelters and community preparedness. Yet our flood management philosophy remains overwhelmingly reactive. Relief and rehabilitation receive attention after disasters occur, while long-term investments in resilience remain inadequate.

The absence of crop insurance, disaster insurance for small businesses and comprehensive social protection means that the financial burden of climate shocks falls almost entirely on vulnerable households. Every flood wipes out years of savings for thousands of families who bear little responsibility for the global climate crisis driving increasingly extreme weather.

Water governance also extends beyond national borders. Since most major rivers originate outside Bangladesh, effective flood management depends on timely sharing of hydrological data and stronger regional cooperation. Water diplomacy has become as important as engineering. As flood risks spread towards Sylhet, Sunamganj and Rangpur, regional coordination will become even more critical.

Floods cannot be eliminated in a deltaic country. Living with water is part of Bangladesh’s geography. But living wisely with water requires a different philosophy of development.

Four reforms deserve immediate priority. First, natural drainage systems, canals and flood retention areas must be legally protected and restored before further urban expansion proceeds. Second, Bangladesh should introduce weather-indexed crop insurance to protect farmers from catastrophic losses. Third, dedicated emergency financial support should help small and medium-sized enterprises recover quickly after disasters through soft loans and temporary tax relief. Finally, every major infrastructure and urban development project should undergo a mandatory climate risk assessment before approval.

The floodwaters will eventually recede. Roads will reopen, schools will resume, and public attention will shift elsewhere. But the lessons of this monsoon must not disappear with the water.

This year’s floods have delivered a stark warning. They have exposed the humanitarian vulnerability of flood-affected communities, the economic fragility of farmers and small businesses, and the environmental bankruptcy of cities that have sacrificed rivers, canals and wetlands in the name of development.

Emergency relief saves lives, but it does not build resilience. Bangladesh now faces a defining choice: continue rebuilding after every monsoon or fundamentally rethink how it plans its cities, protects its rivers and prepares for a climate future in which extreme weather is becoming the norm. The survival of both our riverine civilisation and our rapidly expanding cities depends on making the right choice today.

(The writer is a researcher and development professional).