Holly Cole's Shade.
If you haven't heard this Canadian singer, you're really missing something. About half of Shade has her singing smoking-hot versions of old tunes on the subject of summer heat--Heat Wave, Something Cool, Too Darn Hot.
Right now, I'm listening to her Blame It On My Youth album -- very old, some interesting dissonance, and The Holly Cole Trio made some beautiful music. To tell you the truth, I haven't listened to her in several years; thanks for giving me the unintentional nudge.