We put misters in for our chickens, maybe ducks would like this too? They run for about ten minutes every hour and it drops the air temp in their run about 15 degrees while running and the ground gets wet and cools down.
Cute chick!:jumpy And welcome to BYC
Unfortunately I can’t answer your questions, but I am sure someone who can will be by soon. I am also in AZ and was wondering about how our low humidity affected hatching.