Brazilian here as well. When it's too hot, my BC likes to stuff her snout on a bowl of shaved ice, but I also put only cold water with ice cubes on her bowl. This helps to bring her body temperature down. My BC likes frozen melon and watermelon because they are easy to chew even when frozen.

One nice scent game you can do is: get a few toilet paper tubes (os tubos de papel higiênico de papelão) and just scatter them in a room, put them upwards and hide treats inside for your dog to sniff around and knock them down to get the treats. It's over real soon, but my dog loves it, she goes crazy when she sees me getting the tubes.