Growing Organic in harsh enviroments

I have recently relocated to an island off the coast of West Africa and have started to study how they farm and garden in this very very harsh enviroment. The average day time temperature is 22c all year round but when the wind changes direction the temperature climbs up to 43c without any warning, these are called the calimas, and
come from the Saharan desert and carry a lot of sand with them. Also the islands have constant sunshine with very little rain water.

The land is mainly made up of Lava rock Thrown up by many volcanoles, but when exploring this island you do find farming and gardening taking place. Vines are grown here producing there own wine which I must try out.