Randy Travis has been admitted to a Texas hospital in critical condition for treatment of a heart condition, according to a statement from a Nashville public relations firm representing the country singer.
The release from Webster & Associates said Travis, 54, was "suffering from complications of recently acquired viral cardiomyopathy."
His representatives declined to say where Travis was being treated. He was admitted on Sunday.
The singer lives in Tioga, near Pilot Point. Some residents of the small Grayson County town are worried about Travis.
"Lots of prayers so he gets to come back home," said Lilian Avila. "He likes to come out and support this town. A lot of people love him, so I'm sure everybody is a little concerned."
Fans also started flooding Facebook and Twitter with prayers and messages for Travis. Some called 99.5 The Wolf radio station.
"Everybody is pulling for Randy Travis, despite everything he's been through the last couple of years," said Mark Phillips. "I think people still really like Randy Travis and he's just got a ton of country music hits that people still love to listen to."
The Mayo Clinic website describes cardiomyopathy as a disease that weakens and enlarges the heart muscle, making it harder for the heart to pump blood and carry it to the rest of the body. It can lead to heart failure. Treatments range from medications and surgically implanted devices to heart transplants.
The Grammy-winning performer was in the headlines locally following a 2012 arrest for drunk driving in Grayson County He found naked after crashing his Pontiac Trans Am.
Travis pleaded guilty to the charge in January and was sentenced to two years' probation. He was fined $2,000 and required to spend at least 30 days at an alcohol treatment facility and to complete 100 hours of community service.
Travis has sold more than 20 million records and has had 18 No. 1 singles, according to his official biography.
He was scheduled to perform Wednesday at the Deadwood Mountain Grand Casino in South Dakota.
The Associated Press contributed to this report.