The Navajo Nation’s Commission on Emergency Management issued the new declaration Monday. The reservation spans parts of New Mexico, Arizona and Utah and includes a region that been dealing with severe to extreme drought for weeks now.

Tribal officials are anticipating large-scale drought conditions to persist this summer. They say that will create a shortage of water and feed for livestock.

The tribe also is grappling with feral horses, heavy populations in remote locations and winter range areas like the Carrizo Mountains. Officials say the Navajo ecosystem can’t support the number of feral horses that currently exist.