"Heat Waves" is a song by English group Glass Animals, released as a single from their third studio album Dreamland on 29 June 2020. It was released alongside its music video. The band ran a remix competition for the track, with 19-year-old British producer Shakur Ahmad winning and having his remix issued by the band, alongside a remix by American DJ Diplo in August 2020. Another remix features vocals from Puerto Rican-born American rapper Iann Dior. "Heat Waves" is the group's most successful single to date and was a number one hit in Australia, in addition to being a top 10 hit in the UK and top 20 in America.
"Heat Waves" became a worldwide sleeper hit and the group's most successful single to date. It was voted into first place on the Australian Triple J Hottest 100 of 2020, making Glass Animals the first British act to top the countdown since Mumford & Sons won the 2009 poll with "Little Lion Man". It then spent six weeks at the top of the Australian ARIA Singles Chart and reached the top 20 in several territories including number 19 on the US Billboard Hot 100. On the UK Singles Chart the single originally peaked at number 19 in the first half of 2021. After wide use as the backing music in various TikTok videos, the song re-entered at number 18 in September 2021 and continued into the top 10. The viral video also helped the song climb back up 31 places to number 14 on the Irish Singles Chart in its 41st week on the chart.