The summer of 2026 was defined by prolonged heatwaves, prompting a surge in interest in simple, low-tech solutions to combat the rising temperatures. Among these, items like Meudon white—chalk powder used to coat windows—and survival blankets, which act as temporary window coverings, became widely used. These DIY solutions are designed to reduce solar radiation without the need for permanent structures like shutters or blinds. Their popularity has led to shortages in stores, as more people seek affordable and immediate ways to stay cool. In addition to these visible solutions, other traditional and less well-known methods have been used for years in the world’s hottest regions. For example, in the M’zab region of Algeria, homes are designed with open doors and courtyards that promote natural air circulation. This approach, known as passive ventilation, allows cool air to flow through homes, reducing indoor temperatures without relying on electricity. Architects have adapted these techniques by keeping front doors open during the day and using security systems to allow for slight openings at night, maximizing airflow. In traditional architecture, especially in desert regions, design choices are made to work with the environment. Homes in the Algerian desert, for example, use open spaces and patios to create thermal convection. During the day, people move to cooler ground floors, and in the evening, they return to upper levels that have naturally cooled. This method has been shown to reduce indoor temperatures by 5 to 7 degrees Celsius compared to outside conditions. Similarly, materials like raw earth, which have been used for centuries, are being reconsidered for modern construction. These materials require minimal energy to produce, emit less carbon dioxide, and can be reused, offering both environmental and cooling benefits. At the city level, urban planners are exploring ways to cool entire neighborhoods through design. Using lighter-colored paint on buildings, planting more trees, and increasing green spaces can create shade and lower temperatures. Some co-ops have taken matters into their own hands, planting densely in shared outdoor areas and noticing significant temperature differences during heatwaves. While air conditioning remains important for vulnerable populations, research suggests that it should not be universally adopted, as it can contribute to urban heat islands. Instead, strategies like proper building orientation, shading, and thermal mass are being emphasized to maintain comfort without relying on energy-intensive cooling systems.