Keeping your horse or livestock cool and comfortable during the summer is absolutely vital. When high ambient temperatures and humidity combine, body heat may accumulate faster than your horse can get rid of it. Barns and stables are typically enclosed to provide shelter for horses, but enclosed spaces without proper ventilation equipment can cause serious problems.
Horses are built to endure high temperatures and humidity levels, but, like humans, can easily fall prey to heat exhaustion if adequate temperature regulation is not provided.