How did environmental factors sometimes lead to disruption along the arabian trade routes

Draught

Explanation:

These were known as the intense trade routes which are a major network of land and sea routes, linking the Mediterranean world with eastern and southern sources of species stretching from North Africa and Arabia. A most important part of this route was the Persian Gulf due to its prominent position Yemen attracted people to settle in fertile crescents. The third-century seemed to be significant for the Arabian traders as the nature of trade completely changed. Drastic climatic conditions disrupted the trade which was brought to a halt by the poor economic conditions. As a fall in the coffee production and decline of ports such as Alexandria led to the decline.

There is totally sun all the way down there.