The storms produced historic flooding throughout the northern half of the state and spawned a tornado that struck near Tulsa International Airport on May 21.
Stitt announced the approval Tuesday, saying it makes federal funding available for cities, counties, rural electric cooperatives and the state to repair infrastructure and other costs associated with the storm response.
Stitt said damage estimates from the storms stand at $22 million.
The counties approved for assistance extend from west to east across the northern half of Oklahoma and Stitt said assistance was also approved for individuals and business owners in 27 of the counties.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.