The World Food Programme has warned that South Sudan could be sent into a famine over the next few months.
Severe flooding that inundated towns has also destroyed many crops. The country has yet to recover from a war that lasted six years.
Within the first month or so of 2020, some 5.5 million people are expected to not have enough food.
The WFP said that flooding wiped out 73,000 metric tons of potential harvest along with cattle and goats.
The agency estimates that it needs $270 million in aid.