As other posters have said... HOT
We only had rain one night out of 6 nights and no rain during the day last year. The year before we had a rain shower one day that lasted about 30 minutes and that was all the rain we had. Just really hot! We bought water bottles with fans on it from wallyworld and that helped. Plus, used our free snacks on cold drinks, ice cream and dole whips....helped a lot!