heat wave
nounUS /ˈhit weɪv/
1
Idiomatic A period of exceptionally hot weather.
- We're havin a heat wave / A tropical heat wave / The temperatures rising, it isn't surprising / She certainly can, can can! / She started a heat wave / By letting her seat wave, / in such a way that the customers say / that she certainly can, can-can!1933, Irving Berlin, “Heat Wave”, in As Thousands Cheer:
2
Broadcasting, Climatology, Media, Meteorology, Natural sciences, Weather US, Idiomatic Three consecutive days with daytime high temperature of 90 degrees Fahrenheit or higher.
3
Broadcasting, Climatology, Media, Meteorology, Natural sciences, Weather UK, Idiomatic A period of at least three consecutive days with daily high temperatures of the respective county's temperature threshold or higher.
4
An electromagnetic wave in the infrared spectrum.