Houston is not the only place that has unbelievable humidity. We were in New Orleans a few years ago ,pre katrina, and the humidity was so high I felt like I was drowning. I could not seem to get a proper breath of oxygen.
Believe me, I know. My husband lived in Houston for about 6 years (after a similar amount of time in Phoenix) before he moved back to DelMarVa in the mid '80s. I know things are bad around here when he comments that "this is even worse than Houston."
We have been rather lucky so far this year, we haven't had too many of those type days. In fact yesterday was about the worst. However a cold front moved in around 3pm and the temp went from 96 to 80 in about 45 minutes and then the rain came :)