The Sahara Desert in northern Africa is the largest region in the world having the BWh climate. Name another desert in each of the northern and southern hemispheres having the BWh climate. Southern Hemisphere:
Northern Hemisphere:

Northern Hemisphere:  Thar desert

Southern Hemisphere:  Great Australian desert

Explanation:

The BWh climate is a desert climate. It is a hot and arid climate o the deserts, as classified by the Köppen climate classification of BWh and BWk. The BWh zone falls on the hot and arid regions.

One desert in the Northern hemisphere which contains BWh climate is Thar desert in India. It is a very hot desert with very sandy and rocky surfaces.

One desert in the Southern hemisphere having BWh climate is the great Australian desert. It is a sandy desert with very less precipitation.