"Heat Waves" is a song by British indie rock band Glass Animals released as a single from their third studio album Dreamland on 29 June 2020. A sleeper hit, it is the band's signature song and biggest hit single to date. In addition to reaching number five on the UK Singles Chart and being a top-five hit in several other European countries, it reached number one in Australia, Canada, Lithuania, Switzerland and the United States, where it topped the Billboard Hot 100 for five weeks in early 2022 after a record-breaking 59-week climb to number one. At 91 weeks, it became the longest charting song on the Hot 100 of all time, surpassing "Blinding Lights" by The Weeknd. It would later be surpassed by Teddy Swims' "Lose Control" in May 2025. By June 2024, the song had accumulated more than three billion streams on Spotify. At the 2022 Brit Awards, "Heat Waves" was nominated for Best British Single.