Recent floods killed at least 50 persons in 11 communities in Adamawa and injured 71 others.
Executive Secretary of Adamawa Emergency Management Agency, ADSEMA, Suleiman Mohammed, made the declaration on Friday in Yola.
He blamed the flooding on the release of water from Lagdo Dam in neighbouring Cameroon.
He also said that the flood destroyed 172,000 farmlands and food crops worth millions of naira.
Some of the affected local government areas are Numan, Shelleng, Yola South, Yola North, Demsa, Mayo Belwa and Michika.