Nearly 700,000 Rohingya Muslims have fled to Bangladesh since last August to escape a military crackdown in neighbouring Myanmar. Most now live in flimsy, bamboo-and-plastic structures perched on what were once forested hills.
Bangladesh is lashed by typhoons, and the Rohingya camps are clustered in a part of the country that records the highest rainfall. Computer modelling by the United Nations refugee agency (UNHCR) shows that more than 100,000 refugees will be threatened by landslides and floods in the coming monsoon.
The rains typically begin in April and peak in July, according to the Bangladesh Meteorological Department. Below is an interactive graphic, illustrating the scale of the threat.
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