The fire is in Mechanicsville at 490 Glenn St SW, Atlanta, GA 30312.
Mitchell spent seven years in the military before leaving to pursue a civilian career.
Fox Theatre, Woodruff Arts Center are proposed as possible sites for the tournament draw, while Mercedes-Benz Stadium could host matches.
News helicopter footage showed dozens of firefighters scouring the debris, with a group appearing to use a saw to cut through the wreckage.
Manna From Above President James Watson said the number of families seeking help has tripled over the past year.