Evaporative cooling lowers air temperature by absorbing heat during the phase change of water from liquid to vapor.

In hot, dry climates like Morocco, this process is highly effective due to low humidity.

For instance, traditional Moroccan courtyard houses, Riads, use this principle through central fountains and vegetation. As water evaporates and plants
transpire, the courtyard air cools. Thick walls and shaded facades limit heat gain, while the vertical courtyard allows warm air to rise and escape, creating
a cooler microclimate within the house.