Bangladesh is a riverine country where the monsoon season is deeply connected with nature, agriculture, and human life. However, in recent years, floods have gone beyond the limits of normal natural disasters and have taken a severe form. Due to climate change, significant changes are being observed in rainfall patterns; excessive rainfall within a short time, sudden floods, river erosion, and waterlogging have now become regular occurrences. As a result, people's livelihoods and the economy are being severely affected. In this situation, a question arises: is the change in nature more responsible for this crisis, or is it human mismanagement and unplanned development?
Climate change refers to abnormal long-term changes in the Earth's weather patterns. According to the Intergovernmental Panel on Climate Change (IPCC), excessive emissions of human-induced greenhouse gases are the main cause of global warming. Scientist Svante Arrhenius first explained that carbon dioxide traps heat in the atmosphere, increasing the Earth's temperature. At present, due to industrialization, fossil fuel use, and deforestation, carbon dioxide and methane levels are rising rapidly. As a result, global temperatures are increasing, glaciers are melting in the Himalayas and polar regions, and sea levels are rising. Extreme weather events such as excessive rainfall, droughts, wildfires, and cyclones are becoming more frequent. As a low-lying riverine country, Bangladesh is among the most vulnerable to these changes.
Bangladesh is prone to three main types of floods: river floods caused by rising river levels, flash floods caused by hill torrents, and urban flooding caused by waterlogging. Because the country lies in the basin of the Ganges, Brahmaputra, and Meghna rivers, large volumes of water flow during the monsoon season. In the northeastern region, heavy rainfall in Meghalaya and Assam often triggers sudden flash floods. In cities like Dhaka and Chattogram, unplanned urbanization, encroachment of canals, and poor drainage systems cause severe waterlogging even after light rainfall. Climate change has further intensified rainfall irregularity, increasing the frequency and severity of floods.
In recent years, floods in Bangladesh have become more destructive. In 2024, abnormal rainfall caused widespread flooding across many districts. Millions of farmers were affected, and agricultural losses reached thousands of crores of taka. Rice, vegetables, and fisheries suffered the most. Experts argue that flooding is now not only an agricultural issue but also a serious threat to food security. Floods force thousands of families into shelters, creating shortages of food and safe drinking water. Waterborne diseases such as diarrhea and skin infections increase significantly, especially affecting children and the elderly. Education is also disrupted as schools remain closed, while infrastructure damage halts transport and economic activities.
Urban flooding has become another major concern. In cities like Dhaka, Chattogram, and Sylhet, even a few hours of heavy rain can paralyze daily life. In 2025, monsoon rains caused severe waterlogging in many parts of Dhaka, leading to traffic congestion and public suffering. Experts identify unplanned urbanization, loss of canals, weak drainage systems, and waste accumulation as key causes. Climate change has worsened the situation by increasing short-duration heavy rainfall events.
The government has taken several initiatives, including flood forecasting systems, early warning programs, embankment construction, and relief operations. However, weak coordination, poor maintenance, river encroachment, and lack of long-term planning continue to limit effectiveness. Even with warnings, many low-lying areas still face severe flooding each year.
To address this crisis, integrated and long-term solutions are essential. Forest conservation and large-scale tree plantation can help reduce flood risks by improving water absorption. Rivers, canals, and wetlands must be protected from encroachment. Sustainable urban planning and improved drainage systems are necessary to reduce urban flooding. Developed countries must also reduce carbon emissions and provide climate finance and technology support to vulnerable nations. Public awareness and community-based disaster preparedness are equally important.
In conclusion, floods in Bangladesh are not only natural disasters but also the result of climate change and human mismanagement. Without proper planning, environmental protection, and strong governance, the situation will continue to worsen. As a result, it is clear that saving the country requires controlling not only floodwaters but also the failures in management that intensify them.
The writer is a student, Rajshahi University
