The impact of Sudan's floods has increased, with more than half a million people affected by this month's inundations, the United Nations said Tuesday. "An estimated 574,540 people have been affected," the U.N. Office for the Coordination of Humanitarian Affairs (OCHA) said, citing government figures. The number of flood victims has risen as more rains come down and new information becomes available. Roughly 50 people have died from the heavy rains and floods, according to the government. OCHA said that Khartoum and its surrounding region is worst-hit, with more than 180,000 people affected. But figures cited by the United Nations show that almost every other state has also been struck. Blue Nile is among the worst, with more than 125,000 people affected there.