An 88-year-old woman, trapped in her car for six days after driving off the road on the way home from the grocery store, sustained herself by wiping condensation off the windshield with a towel and sucking the moisture, her son says.

Mary Lillian Anderson was in satisfactory condition Thursday at Southwest Washington Medical Center.

She was rescued Wednesday by a delivery truck driver who noticed the car stuck in blackberry bushes just off Interstate 5 and peered inside. He says he was braced for the sight of a body.

"She was sitting right there, staring back at me," said Andrew Thompson, who delivers propane in rural Clark County. "She looked very happy."

Thompson said the height of his truck's cab gave him a perfect view Wednesday of the cranberry-colored car down the embankment.

"If there had been leaves on the trees, I don't think she would have made it, I wouldn't have been able to see her," he said.