The humanitarian crisis in southern Africa continues to worsen nearly two weeks after Cyclone Idai devastated Mozambique, Malawi and Zimbabwe, killing at least 783.

The United Nations World Food Program reported that at least 600,000 people have been displaced, and the emergency has reached a level three declaration, the same ranking assigned to war-torn Yemen, Syria and South Sudan, according to the New York Times.

Idai is now the third-deadliest tropical cyclone recorded in the Southern Hemisphere according to Weather Underground's Dr. Jeff Masters.

The region is now facing a new threat, as the Red Cross has reported its first cases of cholera in Mozambique's city of Beira. Malaria and other diseases are likely to spread due to standing water and unsanitary conditions brought by the floods.

(MORE: At Least 600,000 People Displaced by Tropical Cyclone Idai)

According to rescue workers, thousands may have been swept out to sea during the worst of the floods, and may never be found.

The devastation was compounded by washed out roads and bridges, making it difficult for aid workers to reach people in need. A key road into hard-hit Beira was finally opened on Monday, and workers have been rushing to supply food, restore electricity and water and help the injured and ill.

The powerful cyclone destroyed thousands of homes in Beira and nearly 90 percent of the city, according to the Red Cross.

The flooding also left a 30-mile stretch of Mozambique’s Sofala province completely under water after the Buzi River burst its banks.

Click through the slideshow above to see the full scope of the storm.