Glad i came across this thread.
Here i lovely Adelaide it will be 37 again today then we are looking at 39 in the middle of the week.
I let Lachlan out early in the morning and later in the evening when our lawn area is under shade.
We dont have any under cover areas out the back to playunder so we are inside.

Playing in the bath tub with toys is one of our favourites
When we got outside we have a water sand play table that we fill with water and he splashes away.