Relief and Rehabilitation Commission Deputy County Secretary said floods affected 22,890 households in Tonj South County of Warrap State.
Asunta Adhieu said the affected people need urgent help of food and shelters, Don Bosco Radio reported.
She explained that the most affected places were in Tonj, Manyangok, Wanalel, Thiet, and Jack Payams.
Ms Adhieu said they found that floods destroyed many houses in five payams and Bomas of Greater Tonj.
She said people of Malual-Mock and Mabior-Yar Bomas were displaced to the road while those of Jack Payam took refuge in Thiet Payam.
Ms Adhieu appealed to the state government and NGOs to help the victims with food, medicines, mosquito nets and shelters.
She urged the state government, international and national NGOs to urgently rescue the worsening situation of flood affected people.
Ms Adhieu advised parents and guardians to take care of their children from water because water levels were increasing everyday.