A teenager thought to weigh more than 50 stone had to have part of her home dismantled because she was too big to get out of the house.
A 40-strong team of doctors, paramedics, fire crews, council workers and scaffolders worked to free Georgia Davis - once known as Britain's fattest teen.
The 19-year-old, who needed to go to hospital after falling ill, is thought to have been conscious during the procedure.
It took experts eight hours to remove a wall, leaving a 10ft by 10ft hole in the top floor of the terraced house in Aberdare, South Wales.
A bridge was built from the roadside to the gap in the wall to enable the emergency services to remove Ms Davis.
The Welsh Ambulance Service sent a specially reinforced vehicle for obese patients - known as a 'bariatric ambulance' - to the property.
A joint statement by the emergency services involved said that after visiting the house on Wednesday, the decision was made to "remove a female from the premises".
The following day, "all agencies, including Rhondda Cynon Taf council's emergency planning and social services team, returned along with a number of specialist teams from South Wales Fire and Rescue Service and a scaffolding company to secure the removal of an area of the premises," the statement said.
The Cwm Taf Health Board said in a statement that Ms Davis was transferred to Prince Charles Hospital.
"This young lady has had a settled night and has been seen this morning by the consultant in charge of her care," the statement said.
"Initial assessments have been undertaken and she will be undergoing further assessment during the day to assist in her plan of care."
In 2008, Ms Davis - then 33 stone - was sent to a 'fat camp' in the US to lose weight.
After nine-months she had managed to reduce her weight to 18 stone, but has since spoken publicly about her struggle to keep off the weight.
"On behalf of Wellspring , we are all deeply saddened to hear of Georgia Davis' recent health crisis," Dr Dan Kirschenbaum, from the US facility, said in a statement.
"Our thoughts are with Georgia and her family during this difficult time."
Before going to the US, Ms Davis compared her desire for food to an addiction.
"If you get to the point where I was, you can't stop eating," she said. "It is like heroin - you need help. I really didn't want to be that person anymore.
"I wanted to change and I've wanted to change for a long time."
Ms Davis started overeating at the age of five, after her father died from emphysema.