Sakibul Hasan

The consequences impacts of climate change are becoming gradually apparent across the country's coastal areas. Rising sea levels, stronger cyclones and storm surges, expanding salt concentration, unpredictable rainfall, river erosion, and extended waterlogging are collectively changing the region's economy, environment, and the way of life. Experts worn that climate change is not a longer future threat - it is a present-day reality for millions leaving along the coast.

Heavy rainfall and flash floods that struck southeastern part of Bangladesh in July have once again highlighted the country's growing climate vulnerability. While the immediate impacts were  contracted in the hilly and eastern districts, climate scientist say that changing sea conditions, worsening  salinity and accelerating coastal erosion in the south even greater long-term challenges.

Approximately 710 kilometres of Bangladesh  coastline supports the livelihoods of million of people who depend on agriculture, fisheries, forestry, and small-scale business. Nevertheless, these sectors are becoming incrementally vulnerable to climate-induced shocks. in district including Satkhira, Khulna, Bagerhat, Bhola, Potwakhali, Pirojpur, Noakhali and Cox's Bazar,  Rising salinity is reducing agricultural productivity, intensifying the shortage of safe drinking water, and forcing communities to alter there traditional livelihoods.

Agricultural experts say that land once capable of producing two or three crops a year is gradually becoming unsweitable for conventional farming. Many farmers are shifting to shrimp cultivation or salt tolerant crops. While shrimp farming has increased for some households, it has also reduced food crop production and limited employment opportunities for farming communities. 

River bank erosion and coastal land loss are creating another layer of vulnerability. Every year, thousands of families lose their homes and  agricultural land, forcing many to relocate another place which is so uncomfortable for homeless people. A growing number migrate to cities such as  Khulna, chattagram and Dhaka in search of work. Researcher describe this trend as one of the country’s most visible forms of internal climate-induced migration.

Environmental experts also point to the worsening  crisis of fresh water availability in coastal areas. Increasing salinity in rivers, canals, and ponds has forced many communities to travel long distance to collect drinking water. Women and Children bear a these disproportionate share of this burden, while prolonged exposure to saline water is associated with a range of health risks.

The Sundarbans, Bangladesh's natural protection against coastal disaster and the world's largest mangrove forest, is also under mountain pressure from climate change. Rising sea levels, increasing salinity, and repeated cyclones are endangering its ecological diversity and delicate ecosystem. Conservationist worn that any significant diggradation of the Sundarbans would weaken the country’s natural defence against storm and tidal surges.

Experts argue that responding to climate change requires far more than post-disaster relief. They stress the need for stronger coastal embarkments,

expended access to safe drinking water, restoration of rivers, mangrove restoration,  adaptation of climate resilient agriculture, and diversified livelihood opportunities. Long-term adaptation, they say, must become a national development priority.

Climate change is no longer so solely an  environmental issue. It's increasingly affecting public health, employment, food security, internal migration, and the country’s broader  economic stability. Without science based policies, sustained investment and meaningful participation of local communities, experts worn taht Bangladesh's coastal region could face even greater challenges in the coming decades.