The aid organisation said that nearly 60 per cent of the displaced were already facing extreme malnutrition before the unusually heavy rains began in July.
In total, an estimated 900,000 people – or 7 per cent of the population – have been affected by the floods, according to Save the Children.
It was difficult to get life-saving assistance to the displaced due to the floods, and aid support had to be temporarily suspended in some areas, the organization said.
READ ALSO: Oil Tanker Explosion: 2 Feared dead, 17 Vehicles Burnt in Sango Ota
“The floods in South Sudan have reached a crisis point and children and their families are in urgent need of support.
“The communities affected are already some of the most vulnerable in the country,” said Save the Children South Sudan Director Rama Hansraj.
READ ALSO: Lightning Strikes Kills 27 in Pakistan
More rain is predicted in the coming weeks.
In October, South Sudan declared a state of emergency after flooding killed nine people and displaced 25,000 others in 27 out of the East African nation’s 32 states.