Broody hens, duck eggs, and rising temps

[KikiDeAnime]

We currently have 2 broody hens, one that's taking a break outside and one that's currently sitting on eggs in the coop. It's currently 96F and still rising. It's expected to be 100+ today so I've been checking on the flock every half hour to make sure they still have plenty of cool water, ice blocks, electrolyte water,the misting system, shade, etc..
The coop is well ventilated but still really warm inside, not like the outside heat but still pretty warm.
Tomorrow and Monday are going to be around the same temps.

Because of how stubborn our hens are, I've been having to kick the hens out to take a break because they're not getting out enough. One had to be brought inside our house to cool down enough to drink some electrolyte water and eat some food before she was put back outside. She was inside for around a half hour.
The new duck eggs were put in the nesting box on Thursday around 2pm.

How often should each hen take a break from sitting?

 

[quackingdom]

How often should each hen take a break from sitting?

My broodies usually take a break once a day, for about 10-30 minutes.

The ducks will take a bath on some of their outings, but in general the ducks and chickens only leave to quickly eat, drink, and poop. I've also tried putting food and water right beside them so they didn't have to leave, but it didn't seem to change things much.

I've never forced a duck or chicken to take a break. They will stand over their eggs rather than sitting on them when it's hot (and mine have successfully hatched eggs in 90-105 degree temps). It really stresses them if you take them off their nest because they're convinced their eggs are dying. Well, I don't know what's going through their heads, but they're desperate to go back to their nests.

If heat stress is a concern, you might have to take them off the nests for their safety. But maybe they shouldn't even be sitting on eggs if it's that hot?

 

[KikiDeAnime]

My broodies usually take a break once a day, for about 10-30 minutes.

The ducks will take a bath on some of their outings, but in general the ducks and chickens only leave to quickly eat, drink, and poop. I've also tried putting food and water right beside them so they didn't have to leave, but it didn't seem to change things much.

I've never forced a duck or chicken to take a break. They will stand over their eggs rather than sitting on them when it's hot (and mine have successfully hatched eggs in 90-105 degree temps). It really stresses them if you take them off their nest because they're convinced their eggs are dying. Well, I don't know what's going through their heads, but they're desperate to go back to their nests.

If heat stress is a concern, you might have to take them off the nests for their safety. But maybe they shouldn't even be sitting on eggs if it's that hot?

Ours are stubborn. Even if I take the $40 eggs out, they'll still want to stay in the nesting boxes.

 

[quackingdom]

Oh you're trying to break their broodiness?

My ducks will leave if I take the eggs, but the chickens will incubate dirt, frozen water bottles, mud, anything. If they can't get in the nest, they go broody beside it. I have one hen who went broody sitting on the rim of a wagon after we blocked her nest. The only way I've found to break their broodiness is to completely change their location. I lock them in a spare mobile coop for about three days and that does it.

 

[KikiDeAnime]

Oh you're trying to break their broodiness?

My ducks will leave if I take the eggs, but the chickens will incubate dirt, frozen water bottles, mud, anything. If they can't get in the nest, they go broody beside it. I have one hen who went broody sitting on the rim of a wagon after we blocked her nest. The only way I've found to break their broodiness is to completely change their location. I lock them in a spare mobile coop for about three days and that does it.

Not trying to break them. I'm letting them hatch.
My original post was about trying to keep them from overheating.

 

[quackingdom]

Oh, I was a bit confused, sorry. Maybe put a fan in the coop with the broodies?

We have an "air conditioner fan" similar to this: https://www.amazon.com/Portable-Conditioner-Evaporative-Cooling-Bedroom/dp/B08WWZH3N8/

Maybe something like that could be mounted just outside a nest?

My broodies have always been all right in that kind of heat, but they're well acclimated to it since it's fairly normal for us.

If necessary, I'm sure they could safely be off the nest without killing the eggs for a couple hours or maybe more. It's not like the eggs are going to get cold.