The “Arab method” for cooling your home during a heat wave: This simple Moroccan technique works without air conditioning

Extreme summer heat is no longer an exception. Cities in Europe as far north as Berlin and Warsaw have already recorded temperatures approaching 104°F, something that would have seemed almost unimaginable just a few decades ago.

In the U.S. a record smashing heatwave has been moving across the upper part of The Lower 48. These events continue to reinforce the growing evidence of climate change.

Heat waves are expected to become more frequent and more intense with each passing year. Faced with this reality, countries around the world are racing to adapt to increasingly oppressive summer temperatures.

Once again, history offers valuable lessons for coping with extreme heat, especially in societies that were not originally designed for it. Arab civilizations, with centuries of experience living in harsh desert climates, developed practical solutions that remain remarkably effective today.

Morocco’s cooling method

Drawing from traditional Arab building practices, communities across North Africa developed simple ways to stay cool by taking advantage of one natural process: water evaporation.

By hanging a damp cotton towel in front of an open window, incoming air can be cooled by several degrees before it enters the room.

The science behind the method is straightforward. As warm air passes through the damp towel, some of the water evaporates. Because evaporation absorbs heat, the air becomes cooler before circulating indoors. The technique works best in dry climates, during the early morning or evening hours, and with a towel that is damp rather than soaking wet. Placing the towel between two rooms with windows open on opposite sides of the house can further improve airflow and enhance the cooling effect.

Lessons from the Arab world

Architect Mavi.arch recently highlighted the ingenuity of traditional Arab cooling techniques in an Instagram video, showcasing methods that spread throughout the Maghreb before eventually reaching the Iberian Peninsula, which can be seen in stunning detail at several historic sites.

Traditional desert architecture was designed to transform homes into natural climate refuges long before electricity or air conditioning existed.

Homes were built with thick walls that insulated interiors from the scorching outdoor heat. They were often arranged around central courtyards featuring fountains surrounded by lush gardens. Together, the water and vegetation created a natural cooling system capable of lowering the surrounding air temperature by several degrees.

It was a remarkable achievement in bioclimatic engineering, accomplished without modern technology. Builders also incorporated wind catchers, strategically placed shade, and carefully planned room layouts that adapted to the changing seasons.

Examples of this type of evaporative cooling have been working for centuries at some of Spain’s most iconic landmarks, including the Orange Tree Courtyard at the Mosque-Cathedral of Córdoba and the Court of the Lions at the Alhambra in Granada. These enduring examples of human ingenuity have taken on renewed importance as communities look for practical ways to adapt homes and cities to the hotter summers of the future.

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