Oklahoma country singer Jake Flint unexpectedly passed away Sunday, hours after getting married on Saturday. He was 37.

His publicist Clif Doyal confirmed to CNN and The Oklahoman that Flint died in his sleep.

His former manager, Brenda Cline, also confirmed his passing, saying on Facebook that she loved the Red Dirt singer-songwriter "much like a son," and that he was “the funniest, most hilarious, hardest working, dedicated artist I have ever worked with in my career," CNN reported.

The cause of his death is not known, CNN and NPR reported.

Flint and his bride Brenda got married Saturday on a remote homestead between Claremore and Owasso, The Oklahoman reported. On Sunday morning, he passed away.

"We should be going through wedding photos, but instead, I have to pick out clothes to bury my husband in," his widow Brenda Flint said on Facebook, NPR reported.

A friend of the last musician told Scripps Tulsa affiliate KJRH that Flint "radiated positivity," and when he was on a stage performing, he "shared his heart."

Matt Eidson, a friend and colleague of Flint's, told the NBC affiliate that the singer's sudden death had shocked everyone.

“Everybody is just in a state of shock," Eidson told the news outlet. "I mean 37 years old and [the] happiest day of his life… you know, he just got married, and he should still be celebrating."

According to his website, the Holdenville native said he began making music after his father was diagnosed with ALS. Flint said on his website that his father recruited some friends to teach his son how to play the guitar since he couldn't play sports with him.

NPR and The Oklahoman reported that Flint released his first album, "I’m Not Okay," in 2016.

He released his follow-up album "Life and Not OK at Cain’s Ballroom" in 2018. He followed that up with "Jake Flint" in 2020 and his last album "Live and Socially Distanced at Mercury Lounge" was released last year, The Oklahoman reported.

CINCINNATI —

Hundreds of children anxiously awaited their COVID-19 shots on Wednesday night.

At Cincinnati Children's Hospital, so many lined up at the Burnet Campus, doctors had to stop taking walk-ins.

WLWT talked with a Northern Kentucky mother and her 10-year-old daughter who waited in line for three hours.

The mother said her little girl was determined to get the shot before she left.

"The line was out the door, wrapped around by the cafeteria and we waited in line for three hours to get her first vaccine. So, it was quite the evening," Maria Borchardt said.

It was a very different mother-daughter night on the town.

Maria Borchardt and her daughter, Lilah Borchardt, 10, waited for hours at Cincinnati Children's Hospital for the 10-year-old's first Pfizer COVID-19 shot.

Children ages five to 11 are now eligible.

We asked Lilah Borchardt what she thought when she saw the long line.

"That's a lot of people. I guess they all want the vaccine as much as I do," Lilah Borchardt said.

Demand is high.

At Cincinnati Children's Hospital, officials said about 400 kids got the shot.

More than 200 were still waiting in line after 6 p.m. at the Burnet Campus, according to a spokesman.

They also stopped taking walk-ins.

"I teach fourth grade and she's, you know, in the fifth grade and we just don't want anybody in our house getting sick. We don't want to be responsible for anybody else getting sick. So, we just want to protect everybody that we love," Maria Borchardt said.

UC Health now has shots by appointment.

Walgreens will offer the vaccine starting Saturday.

CVS Health will start offering the shots on Sunday.

"We're in the process of getting all of the supplies and vaccine to our stores right now," CVS Health Regional Director Sarah Edington said.

The Borchardts saw the demand on Wednesday night.

"The staff at Children's was amazing. They were bringing bananas and waters and Teddy Grahams and color pages. The therapy dog was in there. It was just awesome to see the energy," Maria Borchardt said.

While not everyone is ready to get vaccinated, this fifth grader couldn't wait and has a sticker that reads "POW!" and "Superpower" to prove it.

"My arm hurts just a little bit but I feel relieved that I got the first COVID vaccine," Lilah Borchardt said.

Lilah Borchardt said she has been talking with her friends about her experience.

She said there is nothing to worry about if you don't like shots.

Lilah Borchardt said just keep talking and forget about it.

Cincinnati Children's Hospital said walk-ins are welcome, but appointments can also be made at three clinic locations.

Those locations are the Burnet or Liberty Campus or the Green Township Neighborhood location.

CINCINNATI —

A Silverton dad said he spent hours on Wednesday in search of a COVID-19 test for a child, but he said it was no easy task.

He said many places were busy, with lines, and some had no appointments.

Derek Drifmeyer said he offered to help a friend whose 11-year-old daughter was feeling pretty lousy.

Little did he know, it would turn into an hours-long trip for a test.

"I felt bad for her. We're driving all over town trying to find a place to get a test and she's sick, just wants to be at home resting," Drifmeyer said.

He said finding a COVID-19 test for his friend's daughter took more than four hours, starting at about 10 a.m.

"Went to Walgreens to buy a test. Found out that they were sold out of the take-home tests. Tried to schedule a test with CVS. Every location I tried, it was booked up. Same with Walgreens," Drifmeyer said.

After trying an urgent care, where people were waiting in line for a test, Drifmeyer said they were eventually able to get a test at her primary care provider in a garage.

The Ohio Department of Health said it is expanding testing as demand soars.

"We also continue to see rising numbers of Ohioans tested for COVID-19 and increasing positivity rates now hovering at a seven-day average 13.3 percent. Testing is an important strategy to help mitigate the spread of COVID-19. If you're concerned that you might have COVID there are many options for testing," Ohio Chief Medical Officer Dr. Bruce Vanderhoff said. "In addition to being able to get a test at many pharmacies and community providers, we've also partnered with many of our libraries and local health departments, where you can pick up a free, rapid BinaxNOW test, which can be administered from the comfort of your home with the help of a telehealth provider."

Vanderhoff said demand for testing is high, so he urged everyone to make sure a test is available by searching a map on the Ohio Coronavirus website to find a provider.

At the same time, officials warn that emergency rooms are not for routine testing.

"We need to be able to provide our community with the very best, efficient and quick care for acute conditions," Premier Health System Chief Medical Officer Dr. Marc Belcastro said.

Drifmeyer said the entire COVID-19 situation is frustrating.

He said people should wear masks, get vaccinated if they can and keep trying for a test.

"We were doing well with COVID the numbers were down and people got pretty lax and now they're shooting back up," Drifmeyer said.

He also said he recovered from a breakthrough case himself about a month or so ago.

Walgreens did not respond to our request for comment.

CVS Health told us testing has been in high demand, but stores have been able to keep up with it in most locations.

A spokesman told us people can purchase at-home COVID-19 tests over the counter, limited to six per person, or they can be purchased online and delivered to their door in 24 to 48 hours.

CVS Health provided this statement to WLWT:

"Daily COVID-19 testing volume is currently running ahead of average daily volume year-to-date, and significantly ahead of average daily volume in the second quarter. COVID-19 home test kits are the top-selling item in our stores.

We continue to be able to meet the demand for COVID-19 testing in most locations, even with increasing numbers of patients seeking out tests at one of our nearly 5,000 CVS Pharmacy locations across the country offering testing with same day and future day appointments in most geographies. Patients are encouraged to schedule an appointment on CVS.com or the CVS Pharmacy app, where they have the option to seek either a rapid COVID-19 test, with results available within hours, or a COVID-19 test at the pharmacy drive-thru windows. The self-swab collected at the CVS Pharmacy drive-thru window is processed by an independent, third-party lab and those results are generally available within 1-2 days."

CVS Health said it has also established a new partnership to expand the availability of at-home COVID-19 testing kits in 7,000 of its stores as of last week.

According to CVS Health, it is partnering with Quidel Corporation to make its "non-prescription QuickVue® At-Home OTC COVID-19 Test" available at thousands of locations across the United States and online.

CVS said the packages contain two self-administered rapid antigen tests.