Fire crews were able to remove her from the home.
Emergency crews transported her to North Fulton Hospital's Trauma Center.
"It sounded like an explosion," he said. "I thought there was a tree that had fell on there, but then I saw a tire of the SUV and knew a car had come through the wall."
Smith said the driver was upset and tried to help him get his wife out.
"He said he fell asleep at the wheel and that he was sorry," he said.
Smith said he and his wife have lived in the house since 2001.