I have been on Kali at all times of the year. It honestly seems to me that during the hotter months the water level is higher resulting much more "water damage" then in the cooler months. I recall several times while hot that no one escaped without getting drenched, and during cooler times one or two may get their bottom and back wet. On the cement side walls you can also see distinct higher and lower water level marks. Has anyone else noticed this? 
