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Egypt is the eighth most water stressed country in the world. Egypt receives between 20 mm (0.79 in) and 200 mm (7.87 in) of annual average precipitation along the narrow Mediterranean coast , but south from Cairo, the average drops to nearly 0 millimetres (0.00 inches) in the central and the southern part of the country.
The main air pollution problem in Egypt is particulate matter. The most notable sources of the dust and small particles are transportation, industry, and open-air waste-burning. Another significant source of dust is wind blown from arid areas around Egypt (e.g. Western Desert). The air in Egypt is very thick, grey and there is a haze over Cairo.
Egypt's climate is hot, dry, and dominated by desert. Egypt has a hot summer from May to October and a mild winter from November to April. In the desert, summer temperatures can range from a high of 43°C (109°F) during the day to 7°C (45°F) at night and winter temperatures range from 18°C (64°F) to 0°C (32°F).
Khamsin, [1] chamsin or hamsin (Arabic: خمسين ḫamsīn, meaning "fifty"), more commonly known in Egypt and Israel as khamaseen (Egyptian Arabic: خماسين ḫamāsīn, IPA: [xɑmæˈsiːn] ⓘ), is a dry, hot, sandy local wind affecting Egypt and the Levant; similar winds, blowing in other parts of North Africa, the Arabian Peninsula [citation needed] and the entire Mediterranean ...
The modern, arid Sahara. The Sahara was not a desert during the African humid period. Instead, most of northern Africa was covered by grass, trees, and lakes. The African humid period (AHP; also known by other names) was a climate period in Africa during the late Pleistocene and Holocene geologic epochs, when northern Africa was wetter than today.
Windcatchers that cool by drawing air over water use the water as a heat reservoir, but if the air is dry, they are also cooling the air with evaporative cooling. [2] The heat in the air goes into evaporating some of the water, and will not be released until the water re-condenses. This is a very effective way of cooling dry air. [2]
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The desert climate or arid climate (in the Köppen climate classification BWh and BWk) is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert climates are dry and hold little moisture, quickly evaporating the already little rainfall they receive.