In the Sudanese village of Makaylab, Mohamed Tigani picked through the pile of rubble that was once his mud-brick home, after torrential rains sparked heavy floods that swept it away.
"It was like doomsday," said Tigani, 53, from Makaylab in Sudan's River Nile state, some 400 kilometers north of the capital Khartoum.
"We have not seen rains and floods like that in this area for years," he said, scouring for anything to help build a shelter for his pregnant wife and child.
In Sudan, heavy rains usually fall between May and October, and the country faces severe flooding every year, wrecking property, infrastructure and crops.
This year, floods have killed at least 79 people and left thousands homeless, according to official figures.
On Sunday, Sudan declared a state of emergency due to floods in six states, including River Nile.
The United Nations Office for the Coordination of Humanitarian Affairs (OCHA), citing government figures, estimates over 146,000 people have been affected by flooding this year, with 31,500 homes damaged or destroyed.
But the UN warns that with more than a month of rain still expected, flooding could affect up to 460,000 people this year -- far higher than the average 388,600 people affected between 2017 and 2021.
"Compared to the same period of 2021, the number of affected people and localities this year has doubled," OCHA said Monday.
The flooding is not just along the Nile River, with the war-ravaged western region of Darfur the hardest hit, where over 90,000 people are affected.
The crisis comes as Sudan reels from deepening political unrest and a spiraling economic crisis exacerbated by last year's military coup led by army chief Abdel Fattah al-Burhan.
Almost a quarter of Sudan's population -- 11.7 million people -- need food aid.
Since the start of the devastating rainy season, thousands of Sudanese families have been left homeless, sheltering under tattered sacking.
"Everything is totally destroyed," said Haidar Abdelrahman, sitting in the ruins of his home at Makaylab.
OCHA warns that "swollen rivers and pools of standing water increase the risk of water-borne disease such as cholera, acute watery diarrhea, and malaria."
Upstream, on the White Nile, neighbouring South Sudan has seen record rainfalls and overflowing rivers in recent years, forcing hundreds of thousands of people from their homes, with the UN saying the "extraordinary flooding" was linked to the effects of climate change.
The floods on the Nile in Sudan also come despite Ethiopia's controversial construction upstream across the Blue Nile of a 145-metre (475-foot) tall hydroelectric dam.
In Makaylab, many fear the devastating floods are only the beginning.
"The rainy season is just starting," said Abdelrahman. "And there is no place for people to go."