Start with "It's so hot outside" then add something that's happened! 

Remember to keep it HP-appropriate. 

It's so hot outside all of the vehicles' tyres have stuck to the roads!

its so hot outside my car ac won't keep up

It's so hot outside the pool started to boil

its so hot outside my tires melted

It's so hot outside my shoes melted to the pavement.

“Life is short but also like terribly and insufferably long at the same time.” - Jenna Marbles

It's so hot outside I'm sitting in the dog's kiddy pool. 

It's so hot I melted

it's so hot the chickens are deflated

It's so hot outside the leaves fell off the trees

It's so hot outside, I went inside XD

It's so hot outside the road started to melt

It's so hot outside, my water bottle is sweating

So hot outside I burnt my feet

So hot outside the lakes started boiling 

So hot outside the apples fell off the trees

So hot outside that I cooked inside

It's so hot outside that the grass died 

So hot outside it melted all my chocolate bars 

it's so hot outside that i fried an egg on my dashboard

So hot outside the plastic slide melted 

So hot outside that my elbows sweat(ed?) today.