We started our fermentation of beer at the five gallon mark on our bucket , and over the past two weeks it has gone down to the three gallon mark. It has been real hot where we live for the past two weeks. The yeast that we pitched was white labs WLP- 550 Belgium because it can withstand the warmer temperatures. Is it possible for us to have lost two gallons of liquid to the heat, or could there be another explanation. P.S. Temperature of the beer was 81.3 degrees when we pitched it, and this is our fifth time time home brewing.