How hot is it?
With temperatures nearing 100 here in the Galveston Bay area, I've turned the hot water heater off. The water coming out of the shore water hose is darned HOT in the afternoon, and warm in the morning. Ironicallly, the only "cold" water on the boat is from the turned off hot water heater, since it's a tank down in the relatively cool bilge.
I put a tarp over the upper deck, roll down plastic shades around the walkarounds, and spray the dock and boat down several times a day with the water hose. Water's free, electricity isn't!
It's so hot, I think I could clean the boat with EZ Off Oven Cleaner!
Clothes dry instantly outside.
After rain, it ain't "dry" heat any more!
How hot is it where you are?