 heat stress in animals and a temperature humidity index. I think we all can relate to those dry days where we're outside and it's maybe 80 degrees and it's real dry and we're really comfortable, but you crank up the humidity to about 70% and we're maybe not so comfortable and cattle are kind of the same way. But anyway, she started seeing an increase in respiratory and rectal temperatures at about 69 degrees, THI of 69, which isn't 69 degrees.