The woman, who has not been identified, was taken to a hospital to be checked out. It appears she suffered only minor injuries, including a scratch near her eye.
She was on the second floor of the building when an explosion blew off the walls around 12 p.m. Two AT&T workers used a ladder to reach her just moments before the flames broke out.
"I was able to climb up, carry her down," said Ronald Shockley. "Looked around, the place was gone."
"We just heard the screaming. Crazy," said Garreth Carpenter.
"That lady was so lucky. She was trapped on the second floor there and was right on the edge of the building and what was left had blown up around her and the men ran over and tried to get her to jump. I could hear them saying, 'We'll catch, you.' And she was screaming, 'No, no, I can't jump.' And then you could see the flames break out," John Nieminski, witness, said. "I didn't think she was gonna make it because the flames were getting stronger."
No one else was home at the time of the explosion.
A man in a truck down the street also received a minor injury, but is expected to be OK.
Officials have not said what caused the explosion, but neighbors say a construction crew working on a water line may have struck at gas line. Nicor was also called to the scene.