Just lost my cat while walking him for the first time outside on a leash :(

[Kat0121]

 
Cats sometimes pant like dogs when they get over heated. You can buy cooling sheets for them to sleep on but a fan would help to keep him cool too. Have you tried putting a cool wet towel down in his favourite napping spot?

A bowl of ice in front of a fan works well too. 

 

[Sarthur2]

How's his breathing today?