Severe water shortages are following the the floods in Pakistan which have affected an estimated 14 million people.
Habib Malik, who works for Islamic Relief and has been in Nowshera, a city in the North West of Pakistan which was severely hit by the floods, told the Today programme that he had seen children drinking contaminated water.
"Yesterday and day before I witnessed with my own eyes children suffering from diarrhoea," he added.
"The men who are going back hoping to bring something and they're coming back with disappointed looks. The elderly people, the older men are telling me, that in their entire life they have never experienced this scale of disaster."
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