Fallin's office said Friday that U.S. Secretary of Agriculture Sonny Perdue notified Fallin of the designation, which makes farmers and ranchers in adjoining counties in Oklahoma, Arkansas, Missouri and Kansas also eligible for aid.
The primary counties are Nowata, Rogers, Mayes and Delaware.
Adjacent counties are Washington, Tulsa, Wagoner, Cherokee, Adair, Craig and Ottawa in Oklahoma; Montgomery and Labette counties in Kansas; McDonald County, Missouri and Benton County, Arkansas.
The declaration means farmers and ranchers in the counties can apply for certain types of aid, including emergency loans.
Local Farm Service Agency offices will have information on the declaration and how to apply for assistance.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.