Is South Sudan on the brink of famine?

A record seven million people in South Sudan are facing severe hunger, according to a report by its government and three UN agencies.

That's more than half of the population. A lack of rain, an ongoing economic crisis and years of civil war are being blamed for the worsening situation.

The report stopped short of declaring a famine, but says nearly two million people go without food for long periods and suffer acute malnutrition. That's leading to many deaths.

Over the past two years, the number of people needing food aid has increased by two million.

And if the lack of rain and poor harvests continue, 21,000 people could suffer famine.

So, what should be done to stop this disaster?