CAIRO (AP) — The collapse of the Arbaat Dam in Sudan’s eastern Red Sea state over the weekend flooded nearby homes and killed at least 30 people following heavy rains, a U.N. agency said.

The U.N. Office for the Coordination of Humanitarian Affairs (OCHA) said late Monday , citing local officials, that the actual number of fatalities from the collapse on Sunday might be higher.

Additionally, about 70 villages around the dam were affected by the flash flooding, including 20 villages that have been destroyed. The Arbaat Dam, which is about 38 kilometers (nearly 25 miles) northwest of Port Sudan, was massively damaged because of heavy rains. In areas west of the dam, the flooding either destroyed or damaged the homes of 50,000 people — 77% of the total population living there.

Those affected urgently need food, water and shelter, OCHA warned, adding that damage in eastern parts of the dam is still being assessed. More than 80 boreholes collapsed because of the flooding, OCHA said citing officials, while 10,000 heads of livestock are missing, and 70 schools have been either damaged or destroyed. Heavy rain and flooding across Sudan this month impacted more than 317,000 people.

Of those impacted, 118,000 people have been displaced, exacerbating one of the world’s biggest displacement crises due to the ongoing war in the country. Tuesday marks 500 days since Sudan plunged into war after fighting broke out between the Sudanese Armed Forces and the Rapid Support Forces, or RS.