Beth Dow said her mother-in-law remembered that she had a gallon of water that she used to fill her breathing machine.
“With those broken hands, she took the top off the gallon of water and poured it on her head and put out the flames,” Beth Dow said.
Dorothy Dow is being treated at Grady Memorial Hospital.
Grantville is about 50 miles southwest of Atlanta.
The sheriff is searching for clues. The Georgia Bureau of Investigation is assisting in the investigation.