The Security Council, in a statement, "expressed their deep concern over an imminent offensive by the Rapid Support Forces and their allied militias" against the city of al-Fashir.
The war between the army and the paramilitary RSF has creasted the world's largest displacement crisis.
Today Chad is home to almost a million Sudanese refugees -- more than any other country.
Baerbock's multi-day trip will take her to South Sudan, Kenya and Djibouti, where she will also discuss ways to protect shipping in the Red Sea from attacks by Yemen's Huthi rebels.