Save the Children says neighbourhoods are underwater, with families escaping on tractors, via donkey cart, boats and on foot. Thousands are living in makeshift camps on higher ground.
The majority of the returning migrants were detained, many for nearly two months, in a makeshift migrant detention site at the 22nd of May Stadium in Aden city.
Many arrive in shock, telling stories of loved ones lost during the flight or killed in conflict. Some are injured. Some families are sheltering in public buildings while others are sleeping outside.
