I remember the humid days in NC. Florida has got to be worse. I now ride in the Sacramento heat. Not much humidity, but it can easily top 100º
Something that works for me to remind myself to drink. I use a Timex or a Polar watch with a countdown/repeat timer on it and set it for three minutes. Everytime it went off, I suck down fluids. Sounds weird, and is a pain in the butt at the start, but you don't get dehydrated. It is easy to miss a couple of fluid intake intervals if you are in a race, or being competitive. Miss a few in a row and you won't be able to recover. Set the interval for whatever works for you