Question

what keep the older buildings cool during the day and warm at nigh in kuwait​

Answer 1

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Buildings which are made of stone, bricks or concrete, or embedded into the ground, can feel cooler thanks to the high "thermal mass" of these materials that their ability to absorb and release heat slowly, smoothing temperatures over time, making daytime cooler and night time warmer. The material itself is capable of absorbing moisture in humid conditions, which can later evaporate during hot and sunny days to provide a slight cooling effect and the sandy clayey texture and colour of the buildings which reduces both the absorption and emission of radiating heat.