If you wear 24/7, the biggest thing to know is your body will adapt, eventually. It took me about 3-4 summers of wearing plastic diapers 24/7, but eventually I did stop excessively sweating down there.
Until then, make sure your diaper is very absorbent and has a really good acquisition layer to act as a barrier between your diaper and skin. Any of the premium or abdl diaers out there are good for this. I'd say Abena/Seni quality, or better. And absolutely stay away from any diapers you can buy at a local store. They clog up from sweat in a matter of minutes.
If you normally don't wear a cloth like disposable or a pullup, don't switch to them just because of the heat and sweating. While it IS a good idea in the short term, in the long term it will actually set you back from adapting to the heat. If ever at all. Though there are exceptions to the rule, like if you know you'll be taking a shower in the next couple of hours. Or may need to change now, and then change again soon for whatever reason.
Until then, the only things you can really do to help is use a light amount of powder before diapering up. Make sure to spread it all around your front and back, but not too thick or that will also clog up the diaper. Keep up with any rashes too, they will spread like wild fire in the heat and humidity. And of course, it it gets too bad then give it some heavy consideration to changing into another plastic diaper early.
PS. I moved from Michigan to Florida shortly after becoming incontinent. That was a double wammy for my having to adapt. But I did, and so can anyone else.