Blistering- describes the feeling of being in the direct sunlight. If a piece of plastic gets too hot, it starts to make little bubbles or blister Sweltering - makes me think of long hot days during which the air doesn't seem to move and it's also very humid. torrid - can also be used to describe a love affair, especially if the people are already married to others sultry - can also be used to describe a beautiful (hot) woman or her eyes / facial appearance balmy - this is very warm, but it doesn't have to be negative; some people like balmy weather roasting heat - like you cook meat but it could be used for weather stifling heat - you don't want to even talk-that's how hot it is. If you stifle someone, you don't let them speak. suffocating heat - you feel like you can't breathe I like Meow's "excruciating" too! Today it's excruciatingly hot in the Mid-Atlantic states of the US! Wow. I'm going to go eat some watermelon.

Bloody Hot

We also use 'opressive'

this year it is "excruciating" ! but better ask native speakers