Morocco
Southeast of the Atlas mountains, near the Algerian borders, the climate becomes very dry, with long and hot summers. Extreme heat and low moisture levels are especially pronounced in the lowland regions east of the Atlas range due to the rain shadow effect of the mountain system. The southeastern-most portions of Morocco are very hot, and include portions of the Sahara Desert, where vast swathes of sand dunes and rocky plains are dotted with lush oases.