Times-Picayune reported. He was 45.
Showers, who had a small, recurring role as New Orleans police Capt. John Guidry, was spotted by a steamboat captain and pulled from the water Wednesday, the newspaper said. John Gagliano, chief investigator for the Orleans Parish coroner's office, said he appeared to have been in the water for two days.
Also read: David Mills: A Tribute by the 'Treme' Writers
"Rest In Peace to my costar Micheal Showers," tweeted "Treme" star Wendell Pierce. "He will be a lasting part of our New Orleans story and television history."
"Treme" creator David Simon said in a statement Thursday: "Michael Showers was a fine actor who contributed his talents to our drama in the warmest and most professional way.
"We enjoyed his work -- and working with him. Going forward, we're going to miss having him as part of our production. All of which seems of little import in light of the loss of a man's whole life, and what that loss truly means to him, his family, his friends. Our respect and condolences go to them, especially."
Showers also appeared in the new film "Columbiana" and in the recent "Tree of Life." His seen-it-all face made him perfect for cop roles, which he played in films including "Soul Men," "The Pardon," and "The Collector."
He also appeared in "Traffic" and on "Breaking Bad."
Showers' death comes 17 months after the passing of "Treme" writer David Mills, who died of a brain aneurysm on the set. Related Articles: Gone Too Soon: David Mills, Writer for 'Wire,' 'NYPD Blue' David Mills: A Tribute by the 'Treme' Writers