Badgir or wind tower is a kind of tower constructed on top of the roof of the houses in Yazd and other cities in the desert to capture wind flow and to lead it to the room under for ventilation.
Do not worry about hot wind because a cool water basin under the tower would add some moisture to it and make it cooler.
How does it work when the wind stops? very ingenious, Some cool weather of the last night is enough to make an
airflow at the day when it begins to get hot in the rooms.