Talking of heatwaves, here in the UK everyone is sold out of air-conditioning units. Boo-hoo!

Next plan is to design one in MoI3d.... Sadly though I don't think that may ever work!
But there was a really interesting video some years back where some clever boffin in America made an air-conditioning unit almost completely out of plastic pipes, with some really serious physics involved, and the darn thing actually worked!

So perhaps there is still hope?! Never say never!