There's no reason you couldn't hose off the leaves of your cycads, Mima. They are tropical plants and they like humidity. Cycads growing here in Florida get rained on heavily, sometimes two or three times a day in summer, and don't have problems with crown rot. As long as your pots drain well, they will dry out and be fine.
You also should be looking at keeping the humidity up for your plants and possibly watering more considering the hot weather you've been having there. I doubt you can harm them no matter how much water they get in that hot, dry environment. I'd be misting them with a fine spray with the hose several times a day, I think. Once your summer weather sets in and you're getting maybe some fog in the daytime, that raises the humidity and lowers the temperature.
