Why aren't the fish biting, according to Preacher?

Preacher says the fish aren't biting because it's too hot. He said they've moved away from the shore to the middle of the lake, where they hang around the bottom to keep cool.

Preacher nodded. "The fish, he wants to stay cool too. He don't hang around the shore there-" his arm swept to indicate the river banks-"he goes out into the middle. The water close to the shore, it's hot. You put your hand in it, it feels like soup. But out in the middle of the river, way down deep, it's nice and cool. Down there the fish feels lively and hungry and he eats and when he eats he bites."