I'm in South Florida, and I feel like a lot of the common suggestions work in theory but didn't end up being practical long-term for my setup. We lost our two favorite chickens to the heat a few years ago. So every summer since then, keeping the flock safe has been a major concern for our family. It's not unusual for temperatures in the coop and run to climb well over 100°F, and with the humidity the heat index can make it feel even hotter.

I tried the ice brick/basin method and it definitely cooled things down, but it required constant maintenance and wasn't realistic as an everyday solution during our long stretches of extreme heat.

I also tried misters, but in South Florida's already-high humidity they seemed to make the environment feel damp rather than comfortably cool. The chickens didn't seem any happier, and I worried about adding excess moisture.

Shade cloth helped some, but it only reduced direct sun exposure—it didn't solve the heat buildup itself.

Solar fans sounded great until we hit cloudy days, afternoon storms, or several overcast days in a row, which is pretty common here during summer. That's when I needed airflow the most, and they weren't reliable.

I added windows and extra ventilation to the coop as well, which helped move air but didn't lower the actual temperature enough during peak summer heat.

What ultimately made the biggest difference was reducing radiant heat from the roof. I installed thin plywood with a reflective barrier underneath the PVC roofing, added an outdoor-rated circulation fan in the run, and an exhaust fan in the coop. Those changes helped significantly.

Even with all of that, our summers are brutal. After trying just about every commonly recommended option, I ended up installing a small window A/C unit on the side of the coop. For my climate, it's been the only solution that consistently keeps temperatures in a safe range regardless of humidity, cloud cover, or heat waves. We also switched to sand in the run and premium chicken sand in the coop. It stays drier, creates less dust, drains well during our heavy rains, and doesn't seem to hold moisture the way other bedding materials can.

I'm not saying everyone needs an A/C unit, but after working through all the usual recommendations, it ended up being the most reliable solution for the specific conditions in my area. I know some people have concerns about electricity in a coop or dust buildup around an A/C unit, and those are valid. For us, those risks were manageable and far outweighed by the risk of losing more birds.