United Nations and international agencies warn that the lives of millions of people in Sudan are at risk as the world looks away from the enormous humanitarian needs facing the war-torn country.

Sudan has endured a year of war, which humanitarian agencies agree is causing one of the world’s worst human-made disasters. The World Health Organization said, “The war has had a staggering human cost,” with more than 15,000 deaths and an estimated 33,000 people injured.

“The number of casualties reported is likely an underestimate,” WHO spokesperson Christian Lindmeier told journalists in Geneva Friday.

“We also expect there will be more deaths across the entire population due to displacement, disease outbreaks and the inability to access care for other health issues, maternal and newborn health needs, and lack of access to food and water,” Lindmeier said.

According to a new report by the International Organization for Migration, 20,000 people, half of them children, are forced to flee their homes in Sudan each day.

Since war erupted a year ago on April 15, the IOM said, more than 8.6 million people have been displaced — about 6.6 million inside Sudan and 1.8 million as refugees in neighboring countries.

Amy Pope, the IOM director-general, said, “Sudan is on a tragically fast track to becoming one of the world’s biggest humanitarian crises in decades, and the conflict that has engulfed the country is creating pressure throughout the region.”