A joint Djibouti-U.N. statement on Thursday said up to a quarter-million people have been affected in recent days in the country on the Red Sea that's home to military bases for the United States, China and others. With heavy rains forecast through the end of the month that number could grow.
Djibouti has been called one of the world's most vulnerable non-island nations in the face of climate change as sea levels rise. Neighboring Somalia has been hit hard by recent flooding as well.
In Kenya, East Africa's economic hub, the government said 120 people have been killed in flooding and mudslides during an unusually severe rainy season. More than 60 died over the weekend in West Pokot county.
More than 18,000 people across Kenya are displaced, according to the Kenya Red Cross Society. Infrastructure has been damaged, making aid delivery more difficult.
Doctors are worried that diseases, especially waterborne ones, might spread.