I’m in Oklahoma and my coop is also within my run. I have windows (two on each side) and the south end is all hardware cloth. The coop is quite safe if closed up, but I did not provide anywhere near enough ventilation for our similarly hot hot summers. I spent the first few years making the ducks go into the coop and then closing the door while the birds pant. For the past two years, I decided to leave the door open in the summer, which greatly increases ventilation and allows the night owl ducks to get a drink from the run several times a night. Now I’ve added ducklings and they sleep in the run. The run does have some gaps and I’m afraid that a weasel or snake could get into there, but I feel like the heat is a bigger problem at present.I am in Texas and it’s HOT. Not below 80 at night and heat index of 110 during the day. My coop is attached to my run which is covered top to bottom 100% in 1/4 in hardware cloth. All the windows to the coop that are outside the run are also covered in hwc. We do have fox, coon, possum, feral cats and coyote but I have never seen a coyote in my yard, which has a 6 ft wooden privacy fence. In your opinion could I leave the door open at night for extra heat relief? I also have a camera set to set off lights and sirens if it pick up motion at night.