Fans work fine for hot, dry climates, by increasing your sweat evaporation rate. When coupled to evaporative cooling (fans that pump a little water to evaporate

Fans work fine for hot, dry climates, by increasing your sweat evaporation rate. When coupled to evaporative cooling (fans that pump a little water to evaporate into the wind), they work even better. But in hot, _humid_ climates, they are worthless. Climate change is increasing both average temperatures and humidity in many places. Heat and humidity are a killer combo.