For about four years, from the 2013 release of "Holy Fire" well past the 2015 album, "What Went Down," the English indie-rock band Foals toured almost nonstop, drummer Jack Bevan says, leaving him and his bandmates worn to the bone by the time they left the road for home as 2016 came to a close.

"We were really exhausted," Bevan says by phone from a car on a motorway somewhere between Cologne and Dusseldorf in Germany. "I think we felt physically exhausted and kind of creatively exhausted as well. So we decided to take a year off, and I think, in a way, that was kind of the best thing we've done in terms of the motivation of the band.

"I just think sometimes you need to reset and take stock of what you've done and what it is that you want to do."

So Bevan, singer-guitarist Yannis Philippakis, guitarist Jimmy Smith and keyboardist-bassist Edwin Congreave unplugged and explored life away from each other and the band for most of the year that followed.

"Just to kind of do everyday stuff, which you miss out on the road quite a lot," he says. "I think it kind of made us feel grateful and excited for this sort of weird life we do have."

That odd life of the traveling rock band resumed this year when Foals released "Everything Not Saved Will Be Lost -- Part 1," the album behind which the band will come to the House of Blues in Boston.

As its title suggests, there's also a "Part 2," which arrives this fall to complete the double album the band wrote and recorded after its break.


Philippakis and the rest of the band
Philippakis and the rest of the band

"The first time we jammed together, it just felt really exciting," Bevan says about coming back together at the end of 2017. "There were a lot of ideas and, yeah, I think that's why we've essentially done a double album. That's why the two records happened -- we have too much output, basically."

This album, coming after the Brexit vote in the United Kingdom and the election of Donald Trump in the United States, reflects a bit of the anxiety of the moment in its lyrics and music, Bevan says.

"It's a bit of a strange time to be alive at the moment," he says. "There's just a lot to worry about, and I think that kind of made its way into the record quite a lot. I think definitely for the first time it felt like Yannis was kind of channeling bigger themes, more kind of relevant to what's going on in the world than we have in the past."

Among those themes are such topics as climate change, the surveillance state and the illusion of privacy, and the overall sense that the solidity of civilization is cracking. To that darker vision, Foals add more synths than in the past to "Everything Not Saved Will Be Lost -- Part 1," though Bevan says "Part 2" returns more to the rock feel of earlier albums.

"We had a beginning and end for both records," he says. "The last track on album two was the last track when we thought we were making one album. Everyone was dead set on that -- that really, really feels like the final part of the records.

"And then we had another couple of tracks that felt like one would be the beginning, one would be the middle," Bevan says. "They're part of the same body of work. You can tell they were made at the same time."

In the time Foals spent away from music, the musical landscape on which the band's rock is placed has tilted ever more toward pop, hip-hop and electronic music, a phenomenon easy to see in the disappearance of rock bands in the lineup of Coachella just since 2016, when Foals played the desert fest.

"I did have a worry that basically just by being a rock band, or an indie-alternative rock band, whatever you want to call it, we had become irrelevant without having to do anything in the time between records," Bevan says. "Thankfully, that feels like it's not the case."

But it does feel a little bit different than it did, he adds.

"You know, as Spinal Tap said, I think it's not that they're not as big as they used to be, it's just their audience is more selective," Bevan says with a laugh. "I've misquoted that terribly, but I guess if it becomes more niche to be in a rock band, maybe that's fine, maybe that's cool, and maybe it means that the people that listen will be more passionate overall."

Foals play House of Blues, 15 Lansdowne St., Boston, on Friday, April 19, with openers Preoccupations and Omni, starting at 7 p.m.; $33-$48.50.