A koala whose plight went viral last week when a woman took the shirt off her back to save him from a raging Australia wildfire was put to sleep Tuesday.

The marsupial — dubbed Ellenborough Lewis — captured international hearts when brave rescuer Toni Doherty was captured on video disrobing before charging toward the flames in Port Macquarie and taking the animal into her arms.

She then poured water on the smoldering critter before bringing it to a sanctuary.

The Port Macquarie Koala Hospital confirmed in a Facebook post that the koala was euthanized on Tuesday.

“Today we made the decision to put Ellenborough Lewis to sleep,” the post said. “We placed him under general anesthesia this morning to assess his burns injuries and change the bandages. We recently posted that ‘burns injuries can get worse before they get better.’ In Ellenborough Lewis’s case, the burns did get worse, and unfortunately would not have gotten better. The Koala Hospital’s number one goal is animal welfare, so it was on those grounds that this decision was made. We thank you for your ongoing support.”

Toni Doherty’s husband, Peter Doherty, told Australian outlet 9 News that the couple was at the rehabilitation facility Tuesday morning.

“We are naturally very sad about this, as we were hoping he’d pull through, but we accept his injuries were severe and debilitating and would have been quite painful,” he said. “We would always defer to the recommendation of the staff at the Port Macquarie Koala Hospital.”

Toni had named the marsupial Lewis after one of her grandchildren, according to the report.

The hashtag #RIPLewis was trending on Twitter.

“RIP little man,” one person tweeted. “We’ll miss you but your legacy will live on. Your story should inspire us all to put aside politics and save your species.”

“Poor little guy,” shared another. “Major shout out to the woman who saved him. We should all strive to be like her. We need more people who give a s–t.”

Bushfires have ravaged around 2.5 million acres (3,900 square miles, or about three-quarters of Connecticut) of farmland and bush across Australia’s east coast in recent weeks, killing four people and destroying hundreds of homes.

The country’s koala populations have also been a major victim of the flames, with more than 350 of the marsupials feared killed in a major habitat.

But the Port Macquarie hospital disagreed with reports that koalas are “functionally extinct” in Australia.

“In the regions that have been fire-affected, we won’t know the full extent to changes in population dynamic until they are properly surveyed,” Scott Castle, the hospital’s assistant clinical director, told 9 News. “It’s far too broad to say they are functionally extinct.”

The hospital launched a GoFundMe page last month in hopes of raising $25,000 to help treat koalas affected by the ongoing fires — but they’d far exceeded that, raising more than $1.7 million by Tuesday.