A hot weekend at Arapiles saw us baking in dry 40oC heat in the Pines.
Swimming in the fire dam, somehow avoiding death by rope swing, and not catching any fish
And hiding in nice cool caves (well I did anyway).
In conclusion: lying on cool shady rock on a 40oC is much cooler than sitting in my un-airconditioned apartment on a 40oC day. Climbing in the sun is not the coolest option.