By Ian Williams, NBC News correspondent
The country is no stranger to floods or cyclones. Both are facts of life here. But travel across the water clogged delta, and people tell you that both have been getting worse.
Take the island of Gabura, or what's left of it: A May cyclone smashed the embankments that had protected the island, and now most of it is gone, taken by the sea. The houses that survived cling precariously to spits of land, while makeshift shelters made of bamboo and sticks line the top of broken sea walls.
It's here I met Amjad Gazi, with his wife and six children, who were lucky to survive the raging waters."This one almost got swept away," he wife said, pointing at their youngest son. "There was water everywhere. The currents were so strong, and we were scared."
Gazi pointed out where his home used to be, and the land he had farmed for rice. All that's left is water, with a forlorn-looking cow stranded on a spit of mud beyond.
Gazi still clings to a hope that the water levels may fall, enabling him to return to the land. That hardly seems likely.
"I don't see how much longer we can live like this," he told me. "One day we will have to leave. What else can we do."
That will mean joining the mass exodus to the cities.