Heatwave was a popular international R&B/Funk band with Americans Johnnie Wilder, Jr. & Keith Wilder (vocals) of Dayton, Ohio, Englishman Rod Temperton (keyboards), Spaniard Mario Mantese (bass), Czechoslovakian drummer Ernest "Bilbo" Berger, Jamaican Eric Johns (guitars) and British guitarist Roy Carter.

Heatwave was a rock festival August 23, 1980, outside of Toronto, Canada at Mosport Park, Bowmanville, Ontario. The slogans used to promote the show were variously the "Punk Woodstock", the "New Wave Woodstock", or "The 1980s Big Beat Rock and Roll Party".

Heatwave is the name of a comic book character from Top Cow Productions. He was also a member of the Cyberforce.

Marked warming of the air, or the invasion of very warm air, over a large area; it usually last from a few days to a few weeks.