Thousands of Sudanese refugees in eastern Chad may become “trapped and forgotten” with the onset of the rainy season, medical charity Doctors Without Borders (MSF) says.
The areas where the refugees are staying will be isolated, as the dry river beds fill up with water and flood the surrounding area, according to MSF.
The recent violence in Sudan has driven more than 100,000 people, the majority of whom are women and children, into neighbouring Chad.
Most are living in an areas which are already hosting huge numbers of refugees and suffering the affects of a changing climate.
“We are facing a crisis on top of another crisis,” the charity says in a statement.
It adds that people may end up facing the choice of returning to Sudan to face more violence as the situation in Chad becomes desperate.
MSF has called for an increase in the international effort to ease the situation in Chad.