North Africa is often grouped with the Middle East region due to shared cultural, climate, and geographic traits. The region is divided into sub-regions of Maghrib and Mashriq. North Africa is largely arid with virtually no water as the Atlas Mountains block rain and the Sahara Desert covers most of the land, ranging from hot to below freezing temperatures. However, areas near the Mediterranean Sea and Nile Delta feature more lush vegetation due to influences of warmth and humidity from the sea and river.