The number of people killed in a powerful storm and floods in Mozambique is likely to rise significantly above the current death toll of 84, an aid agency operating in the devastated port city of Beira said on Tuesday.

“We are working with NASA and the European Space Agency to get satellite information to get a full picture of the affected areas and number of people trapped there,” Caroline Haga of the International Federation of Red Cross and Red Crescent Societies told Reuters.

“Given the sizes of these areas we expect the death toll to increase significantly.”