Flood:

Flood waters are coming from India. India opened many dams. Also heavy rain is raising the river water level. For this, the northern part of Bangladesh(Syhlet, Habiganje) and the southern part of Bangladesh (Feni) due to the damage dam. 
Over 18 people died due to the flood. Millions of people are become homeless. Army officers are helping people to rescue and give them food.

For this flood the main exam named SSC has been suspended. The date postponed. 

Flood water has raised the danger level. There is nothing to do about this flood. Because it is a natural disaster. Pray for them. 
But in future, if Bangladesh government become conscious this topic then they will repair and will become the dams stronger. 
The northern part flood of Bangladesh can be solve if they make a dam that is bigger than the farakka dam.