Thousands of children who survived a cyclone in southeast Africa face fresh risks in its aftermath – being sold into slavery by human traffickers or forced into early marriage by families struggling to survive, aid workers say.

Traffickers often prey on lone children caught up in chaotic scenes such as Cyclone Idai, they said, while parents might marry off their young girls as they struggle to eke out a life.

At least 678 people have died and nearly 3 million have been affected after Cyclone Idai hammered Mozambique’s port city of Beira on March 14 before moving inland to neighbouring Malawi and Zimbabwe, the United Nations said.

Idai’s winds ripped apart homes, schools and medical centres and torrential rains triggered floods that inundated vast swathes of farmland in one of the worst climate-related disasters to hit the southern hemisphere.

With the U.N. estimating up to a million children affected in Mozambique alone, aid workers are particularly concerned about orphaned children and those separated from their families who are fending for themselves almost two weeks on.

“In crises like these big, natural disasters, children and parents can easily lose one another,” Rik Goverde from Save the Children charity told the Thomson Reuters Foundation by phone from Chimoio, 200 km northwest of Beira.

“Children are out there on their own – without the supervision or care of a trustworthy adult. They can easily fall victim to sexual violence or human trafficking. We are aware and very concerned about it.”

Goverde said that one mother he met had lost three children,swept away in flood waters, while other colleagues had come across children who had seen their parents die.
The charity’s helpline had received about 10 calls from families reporting missing children, he said, though this was likely “just the tip of the iceberg” as some telecommunications and power lines were still down.

Reports of missing children and unaccompanied children are being registered by the International Committee of the Red Cross(ICRC) on their website, he said, with the priority being to reunite families as quickly as possible.

About 350 people registered on the website – either looking for missing relatives or marking themselves as safe. About 24 children are registered as missing, with teams on the ground collecting more names of the lost and missing.

Experts say post-disaster trafficking has become common in developing nations as an increase in extreme events caused by global warming leaves the already poor even more vulnerable.

The breakdown of social institutions makes it hard to find food and humanitarian supplies, leaving women and children at risk of kidnapping, sexual exploitation and trafficking.

Aid workers say young girls could also be forced to wed as parents who have lost homes and crops are pushed to the brink and seek ways to ease the burden on the rest of the family.