When the air is hot, nothing is more cooling than being in the water whether splashing
or diving to the depths.
Both young and old and their doggy companions all love to cool off by having a dip. Dogs have other ways of cooling off.
a hair cut perhaps
or a dig in the wet soil and then extending so that the full body length is touching the cool earth.
After a long hot walk even a shady part of the paving is cooling.
When you don’t want to be cooled a wind will add an extra cooling effect. Although this was taken in the middle of summer the wind and snow on the mountains succeeded in sending the temperatures down.
Psychological cooling sometimes works. Walking through an artificial ice cave (really cool) to an artificial ice flow with real penguins gave the birds the cooling they needed and made us feel cold.
When all else fails- a glass of ice also cools.
For other lens artists joining in the challenge