I had to choke back tears.  I watched a doctor supported by Save the Children give two-year-old boy Ramzan fluids in a feverous attempt to reverse the devastating effects of severe dehydration.  Ramzan's mother, Hajra, looked on anxiously as the doctor explained she must help her son drink electrolytes to replace lost fluids.

Make no mistake Ramzan is gravely ill.  He has reached a dangerous level of dehydration brought on by watery diarrhoea.  No wonder.  For the last fifteen days mother and child have lived on a baking concrete floor in one of the hundreds of camps that have sprung up in Sukkur district.

In many cases families are sourcing water from stagnant pools, which often contain human and animal waste.   This might sound ghastly.  But what would you do if your son or daughter were desperately thirsty, drifting in and out of consciousness?  Might you accept the risks of drinking dirty water in the hope of alleviating the suffering of your child?

Factor in the stifling heat - temperatures soars high into the forties - and drinking contaminated water might not seem a bad idea.

There's a cruel irony at play in flood-affected Pakistan.  Despite being swamped by billions of litres of water, children and families cannot get enough safe water.