A long drought is what I believe the answer is
Which Countries Border Bangladesh? Bangladesh is a sovereign nation in South Asia that occupies an area of 56,980 square miles. Although it has several neighboring nations such as Nepal, China, and Bhutan, the country shares its land border with only two countries, India and Myanmar.
From :
https://www.worldatlas.com/articles/what-countries-border-bangladesh.html
The Nazis used the theory of evolution as justification for their persecution of the Jewish people. In their mind, Jewish people were "corrupting" the non-Jewish bloodstream. This is what led to the reprehensible eugenics movement.