When The Great Molasses Flood takes the stage at Club Passim in Cambridge on the evening of Jan. 15, audiences will be treated to songs from their upcoming album, tentatively titled “100 Years.” On top of that, the listeners there, at least those making their presence known with applause, will be a part of that album.

The folk-rock quartet will not only be performing their original songs about the deadly catastrophe that killed 21 people in Boston on Jan. 15, 1919, they’ll also be recording them, and that album will be a live one.

Those dates are no coincidence: Jan. 15, 1919 and Jan. 15, 2019 are exactly 100 years to the day. Not exactly a joyous event to commemorate, and the songs are serious.

“One of them deals with the greed of the alcohol company that built the tank and about how it was through this corrupt company that they rushed the project and built something that was ridiculously unsafe in the most densely populated city block in Boston,” said Upton resident Dan Cloutier, the singer-songwriter-guitarist who founded the band, initially a trio, along with Holliston’s Ricardo Barraza and Worcester’s Kim Jennings. Mike Lachance, from Grafton, recently became the fourth member. “Another song commemorates the 21 lives lost in the flood, and another is told through the eyes of a firefighter in the firehouse that got knocked down.”

Cloutier, Barraza and Jennings had all been solo performers for a number of years and, as friends, regularly played both onstage and on records together, backing up whichever one of them was doing a solo project.

“We were just in each other’s orbit,” said Cloutier, 39, who locals may know as the longtime host of the folk open mic at Amazing Things in Framingham. “About three years ago we started to write songs together as a trio. Our solo careers had taken us so far, and we wanted to try something different. That’s when it felt like we were a band. Mike, our bass player, joined us this past fall.”

Cloutier traces the band’s name back to a dozen years ago when, shortly after going on a duck boat tour, a bit of local history he learned got his songwriting juices flowing.

“I grew up in Hopkinton, but I never heard of the Great Molasses Flood until that day on the duck boat,” he said. “I couldn’t believe I didn’t know about such a weird piece of Boston history.”

The event became the title of the song he wrote about it, and it was recorded on his 2009 album “Live at the Masquerade Ball,” on which Barraza and Jennings were part of his backing band.

“After that, when we played together, we kind of jokingly called ourselves The Flood, because of that song,” he said. “Then when we decided to be a band, we changed it to The Great Molasses Flood.

“We just couldn’t get away from that name,” he added, laughing.

At the Passim gig, the group intends to do a lot of rotating around on instruments, meaning that Cloutier will go back and forth between guitar and banjo, along with a bit of harmonica; Barraza will alternate on lead guitar and hand percussion; Jennings will play piano, guitar and hand percussion; and Lachance will be on electric bass, hand drums and ukulele. The founding members are known for their three-part harmonies, and Lachance is also a singer.

“We’ll be doing two very different sets,” said Cloutier. “In the first one, which will have eight or nine songs, five of them will be directly about the flood, and the other handful will be about other disasters that fit the scene. The second set will have another eight or nine songs we’ve written since we became an official band that are much more standard, upbeat folk songs. And Ricardo will be singing a cover of Radiohead’s ‘Creep,’ but in Spanish.”

Asked how the band managed to land a spot at the always busy Passim right on the anniversary date of the actual flood, Cloutier said, “We played there for the Campfire Festival, and I had played solo there before. About a year ago, when we realized that the 100th anniversary of the flood was coming up, I wrote to [Passim manager] Matt Smith, told him about it, mentioned that we wanted to do something with it, and asked if he could keep that date open. And he thought it was a good idea!”

The band landed an "Iguana Music Fund" grant from Passim to help pay for the live recording. Twenty-four grants totaling $40,000 were distributed in 2018 to fund and nurture music projects, including The Great Molasses Floods' live recording. All the recipients will be showcased at Club Passim on April 8 at 7 p.m.

The Great Molasses Flood will record their first album as a band, on the 100-year anniversary of the Great Molasses Flood – Jan. 15 – at Club Passim in Cambridge. Showtime is 8 p.m. Tickets: $20. Info: 617-492-7679.