Released by The Who in 1968, "Heat Wave" stands as a defining track of the psychedelic rock era, characterized by its driving rhythm and distinctive organ sound. The song exemplifies the band's transition from hard rock to more experimental territories, featuring complex time signatures and a soaring vocal performance by Roger Daltrey. As a staple of their discography, it captures the frenetic energy and studio experimentation that defined mid-1960s British rock. Its enduring popularity highlights The Who's ability to blend aggression with melodic sensibilities, cementing their legacy as pioneers of progressive rock and hard rock fusion.