Heat Waves

The summer song that is secretly a sad song

Play "Heat Waves" at a barbecue and nobody blinks. The beat lopes along at a lazy tempo, the synths shimmer like air above hot tarmac, and Dave Bayley's voice floats over everything with that half-asleep, honeyed tone. It sounds like a hammock. It sounds like late afternoon light. It sounds, on first listen, like pure pleasure.

Then you actually listen to what he is singing about, and the floor tilts. "Heat Waves" is not a summer anthem in the usual sense. It is a song about lying awake at night, replaying a relationship that has already gone, wondering whether you could have done more, and accepting that some people slip out of reach no matter how hard you try to hold them. The heat in the title is not the warmth of a holiday. It is the hazy, distorted, can't-quite-breathe atmosphere of missing someone so much that the world looks wobbly.

That gap between how the song sounds and what it means is the whole trick. And it may be the reason "Heat Waves" became one of the strangest success stories in modern pop: a track that started slowly, kept going when everyone else's singles had faded, and eventually climbed all the way to the top of the American charts after the longest ascent in Billboard history.

Background: four friends from Oxford and a very bad year

Glass Animals formed in Oxford, England, around four school friends: Dave Bayley on vocals and production, Drew MacFarlane on guitar and keys, Edmund Irwin-Singer on bass and Joe Seaward on drums. Bayley had been studying medicine and neuroscience, reportedly making music in his bedroom between lectures, and the band's early sound reflected that tinkering mind. Their 2014 debut, "Zaba," was a lush, jungle-flavoured record of odd textures and nursery-rhyme menace. Its follow-up, "How to Be a Human Being" (2016), was a sharper, character-driven album, each song built around a stranger Bayley had met or overheard on tour. It earned them a Mercury Prize nomination in the UK and a devoted indie following on both sides of the Atlantic.

For British readers there is a nice local thread here. Glass Animals came up through the same Oxford scene that gave the world Radiohead and Foals, a city better known for colleges and rowing than for hits, and they were signed early to Wolf Tone, the label founded by producer Paul Epworth, the man behind much of Adele's "21." Their rise was a very British indie story: student flats, home recordings, festival slots creeping up the bill year by year.

Then, in the summer of 2018, everything stopped. While the band was touring, Joe Seaward was hit by a lorry while cycling in Dublin. He suffered a serious skull fracture and brain injury, and for a period it was reportedly unclear whether he would walk or speak normally again. The band cancelled their remaining dates. Seaward had to relearn basic things, and the others faced the very real possibility that Glass Animals was over.

During that long, frightening pause, Bayley turned inwards. Instead of writing about other people, as he had on the previous album, he started writing about himself: his childhood, partly spent in Texas after his family moved there, his memories, his regrets and the people he had loved and lost. That material became the band's third album, "Dreamland," released in August 2020. "Heat Waves" was its emotional centrepiece.

Bayley has said in interviews that the song had been knocking around in some form for a while, and that it is about loss in a broad sense. It is about missing someone, about the feeling of watching a person you care about struggle, and about the hard moment when you realise there is nothing you can do to fix things for them. He has also suggested it is partly about the way certain seasons and certain times of night amplify that ache. It was not one specific breakup so much as a knot of feelings, some romantic, some about friendship, some about grief itself, coloured by the year that had nearly taken the band's drummer.

The single was released in late June 2020, right in the middle of the first wave of the pandemic. That timing would turn out to matter enormously.

Core meaning: decoding the haze

Lyrically, "Heat Waves" is built like a late-night spiral. The narrator is thinking about someone at an hour when sensible people are asleep. There is a sense of summer outside, warm and heavy, but inside his head it is all replays and what-ifs. He cannot stop picturing this person, and the images come back with a dreamy, slightly unreal quality, the way memories do when you are exhausted.

The central image, the heat wave itself, works on two levels. Literally, it is weather: a sticky June night that makes it impossible to sleep. Figuratively, it is the shimmer you see above a road on a hot day, the optical illusion that makes solid things look liquid and distant. That is what grief does to memory. The person you miss seems close enough to touch and impossibly far at the same time. Bayley takes a phrase that usually means "a spell of good weather" and turns it into a picture of distortion and longing.

As the song moves on, the narrator admits something painful. He tried. He wanted to be enough, to be the thing that kept the other person steady, and it was not possible. There is a quiet confession in the verses that he could not change how they felt or what they were going through, and that he has to let that go. It is not angry. It is not bitter. It is the tired honesty of someone who has stopped arguing with reality.

There is also a thread of self-deception. The narrator keeps telling himself he is fine, or that he will move on, but the repetition of the chorus undercuts him. Each time it comes round, it feels less like a statement and more like a loop he cannot escape. Musically, that loop is reinforced by the way the hook keeps circling back with almost no variation, hypnotic rather than triumphant.

What makes the song quietly devastating is how gentle it is. There is no big key change, no screamed bridge, no tears in the voice. Bayley sings the whole thing in a soft, almost conversational register, as though he is talking to himself in the dark. The production, with its pitch-bent synths, warm bass and sleepy drum pattern, mirrors the theme: everything sounds slightly melted, like a record left on a windowsill in the sun.

The ending does not resolve anything. There is no reunion, no lesson neatly learned. The song simply drifts out, as heat waves do when evening finally arrives. You are left with the feeling rather than an answer.

Cultural context and legacy: the slowest hit in history

When "Heat Waves" came out in 2020, it did respectably well for an indie band. It picked up radio play, sat comfortably on alternative playlists and was clearly the strongest song on "Dreamland." But it was not an immediate smash. In a normal year it might have peaked, faded and become a fan favourite.

This was not a normal year. The music video, which Bayley reportedly shot himself in London during lockdown, captured something that hit people hard. It shows him wandering empty streets, performing the song alone, and then connecting with his bandmates and fans through screens. A city that should be full of life is eerily still. For millions of viewers locked indoors, missing friends, family and partners they could not see, the video turned "Heat Waves" into an accidental anthem of pandemic loneliness. A song about missing one person became a song about missing everyone.

Then the internet took over. Over late 2020 and 2021, "Heat Waves" spread across TikTok, where users paired it with nostalgic montages, slow-motion clips and emotional edits. It became especially popular in gaming communities, soundtracking countless fan videos, and it caught fire in markets far beyond the UK and US, from Brazil to Southeast Asia. Each new wave of discovery pushed it a little higher on streaming charts.

In the United States, the slow climb became a story in its own right. The song entered the Billboard Hot 100 and simply refused to leave. Week after week it inched upwards, until in March 2022, around 59 weeks after its chart debut, it reached number one. That was reportedly the longest climb to the top in the history of the chart. It then held the top spot for several weeks. In the UK it peaked inside the top five, giving Glass Animals their biggest home hit by far. It went on to rack up billions of streams and became one of the most-played songs on Spotify worldwide.

The success changed the band's standing overnight. Glass Animals went from respected indie act to arena headliners, and they earned a Grammy nomination for Best New Artist in 2023, a slightly comic honour for a band that had already been releasing albums for nearly a decade. It also changed the industry conversation. "Heat Waves" became a case study for how songs in the streaming era do not need a big launch week. They can be discovered, rediscovered and carried by audiences long after a label might have moved on.

And perhaps most movingly, Joe Seaward recovered well enough to return behind the drum kit. The band that had nearly ended in 2018 ended up playing the song on the biggest stages of their career.

Why it still resonates today

Part of the answer is simply that "Heat Waves" sounds wonderful. It is a perfectly balanced piece of production: catchy enough for the radio, strange enough for indie fans, relaxed enough to play on repeat without fatigue. Bayley has a gift for making odd sounds feel friendly, and this is probably the purest example of it.

But the deeper reason is emotional. The song gives listeners permission to feel sad without feeling crushed. It is melancholy you can dance to, or at least sway to. That combination is very powerful, and very modern. A lot of people do not want songs that shout their pain; they want songs that sit next to them quietly while they feel it. "Heat Waves" does exactly that.

It also captures a specific kind of loss that is hard to name. Not the drama of a breakup, but the slow drift of losing touch, of watching someone you love struggle and realising you are not the cure. Anyone who has had a friend go through a dark patch, or a relationship that ended without a single villain, recognises the feeling. The song does not judge anyone. It just acknowledges how much it hurts to care and still not be able to help.

Finally, there is the memory of when it arrived. For many listeners, "Heat Waves" is now permanently tied to 2020 and 2021: the empty streets, the video calls, the strange suspended summers. Hearing it today can bring all of that back in a rush. Like the heat haze in its title, it turns a solid, specific moment into something shimmering and nostalgic, close enough to feel and just out of reach.

How to dive deeper

🎧 Immerse in the sound

• Dreamland (Glass Animals, 2020) — The full album that "Heat Waves" comes from is a memoir in sound, stitched together with short home-video interludes from Bayley's childhood. Listening start to finish reframes the single as one chapter in a larger story about growing up, memory and fragility.
• How to Be a Human Being (Glass Animals, 2016) — The Mercury-nominated predecessor shows where the band's playful production came from. Each track is a portrait of a stranger, so it is fascinating to hear Bayley turn the lens on others before turning it on himself.
• Heat Waves (Diplo remix and other official versions) — Several remixes and alternate versions were released as the song kept growing. Comparing them shows how sturdy the core melody is, whether it is stripped back or pushed onto a dancefloor.

📚 Follow the story

• Dave Bayley's interviews around the Dreamland era — In conversations with outlets in the UK and US, Bayley has spoken openly about Joe Seaward's accident and how it pushed him to write more personally. Reading them adds real weight to the song's themes of helplessness and care.
• Coverage of the record-breaking Billboard climb (2022) — Music journalists wrote widely about how a nearly two-year-old song reached number one. These pieces are a great window into how streaming, TikTok and global fandoms now shape what becomes a hit.
• Oxford music scene histories — Books and features on the Oxford scene place Glass Animals alongside Radiohead, Foals and Supergrass. They explain how a university city became an unlikely engine of British indie music.

🌍 Visit the places

• Oxford, England — The band's home city is worth a wander, from the college quads to the small venues around Cowley Road where local acts cut their teeth. It is easy to imagine a medical student humming beats on the way to lectures here.
• London's quiet early-morning streets — The "Heat Waves" video was filmed in a deserted London during lockdown. Walk through the city at dawn on a summer weekend and you can catch a little of that eerie, beautiful stillness.
• Austin, Texas — Bayley spent part of his childhood in Texas, and that period colours much of "Dreamland." The thick summer heat of central Texas makes the song's title feel very literal indeed.

🎸 Experience it yourself

• Learn the chords on guitar or piano — The harmonic structure of "Heat Waves" is relatively simple and loops gently, making it a satisfying song for beginners. Playing it slowly reveals just how much mood comes from a few well-chosen chords.
• Recreate the production in a home studio — Bayley built much of the band's sound on a laptop, so try sketching the song in a free music app. Experimenting with pitch-bent synths and lazy drum patterns teaches a lot about how texture creates emotion.
• Catch Glass Animals live — Since the song's success, the band has toured large venues and festivals around the world. Hearing a crowd of thousands sing a quiet song about grief back to the stage is a surprisingly moving experience.

🎵 Listen to this song