Talk about the humidity, how they step out of a building/train/whatever, and it feels like thier swimming, and you gotta have bugs (am I describing a swamp, no) they love the heat (though the height of Sharn's towers makes this a bit implausible). Then to drive the message home have the air feeling hot.
Description: The door swings slowly open, and a wave of sticky moist air encompasses everything, bringing with it countless insects that search out any exposed skin you have. You move sluggishly forward, and not by any fault of your own, as you exit the building a blast of hot wind touches your face, and immediatly beads of sweat appear on your brow.
This decription is what I go through every day in the spring and fall months of Far South Texas, and don't even get me started on summer.