That's a real shame, but I agree that it may well have simply been too hot for them. At least you know that the eggs you got were fertile. If you have a similar situation again it may be worth considering moving the broody to a cooler place (garage, outhouse, spare bedroom...) where she won't get too overheated for the eggs.
Thank you for sharing your experience - especially the eggtopsy. Information like that can only serve to help others in the future.
We have been experiencing similar temperatures here for the last month - fortunately my two broodies had already hatched their chicks before it started, but if they had still been sitting on eggs I don't know if I would have thought about moving them out of the coop - your experience has made me much more aware of how important external temperatures are to a broody. They can regulate the nest temperature to a certain degree, but obviously not that much when there is a heat wave.
Thank you for sharing your experience - especially the eggtopsy. Information like that can only serve to help others in the future.
We have been experiencing similar temperatures here for the last month - fortunately my two broodies had already hatched their chicks before it started, but if they had still been sitting on eggs I don't know if I would have thought about moving them out of the coop - your experience has made me much more aware of how important external temperatures are to a broody. They can regulate the nest temperature to a certain degree, but obviously not that much when there is a heat wave.