The drought in Rajasthan has been a major problem for the Pakistani government and they face a lot of pressure over their handling of it.
Many reports talk of it being a man-made drought - try a look at the BBC News archive and Search for articles.
GLOBAL EYE have produced an excellent introduction to the issues.
The latest articles talked about the possibility of spraying charcoal on glaciers to encourage them to melt. Sounds a little desperate.
Drought is also an aspect of the new Edexcel A A2 Specification, so this could form the basis for a case study.