SAN FRANCISCO (AP) – A Maine native who was hailed as a hero for saving a drowning woman years ago was hospitalized in critical condition Friday with burns on 80 percent of his body after rescuing a dog from a burning building.

Michael Keenan’s chances of survival are 50-50, said doctors at San Francisco General Hospital.

The 43-year-old artist, who grew up in Yarmouth, Maine, injured himself when he ran back into a friend’s burning house – which he had escaped safely – to rescue a Jack Russell terrier on Tuesday.

On Christmas Day 2001, Keenan had jumped into San Francisco Bay to save a couple he didn’t know, who had accidentally driven into the water.

Keenan used a wrench to smash the back window of the submerged car and pulled the woman to safety, but her husband, who was learning to drive, did not survive.