'Not just a monsoon crisis, but a food crisis'
Pakistan is still under threat from flooding all over the country.
A mass evacuation is now under way in central and southern regions of the country. More than 1,600 people have been killed and a further four million people are thought to have been affected.
Flood waters are now reaching the Punjab, Pakistan's "bread basket", and this could have a major effect on food supplies in the country.
Lyse Doucet reports from Islamabad.