UNITED NATIONS, July 29 (Xinhua) -- UN humanitarians said on Monday the United Nations is planning to assist some 2.4 million of the 3.3 million people projected to be affected by floods in South Sudan from September onward.

The Office for the Coordination of Humanitarian Affairs (OCHA) said the United Nations and its partners are supporting the South Sudan government's efforts to prepare for what is expected to be the worst flooding in 60 years.

OCHA said they will provide health and nutrition services, shelter, and food assistance to the displaced.

"To do this and to meet the needs of new arrivals fleeing the conflict in Sudan, more funding for the humanitarian response in South Sudan is urgently needed," the office said.

According to OCHA, this year's humanitarian appeal for South Sudan is just over 30 percent funded, with about 542 million U.S. dollars received of the nearly 1.8 billion dollars required.

OCHA warned that the conflict in neighboring Sudan and other challenges continue to drive humanitarian needs in South Sudan, noting that since April last year, when fighting broke out in Sudan, more than 770,000 returnees and refugees have fled across the border into South Sudan.