What is it: Drought is the prolonged period of abnormally low rainfall leading to a shortage of water. The IDRU has identified drought as a major sign of Slow Disaster on spaceship earth due to it's risk for catalyzing mass migration. It's primary malfunction is the desertification of land leading to potentially hazardous number of forced migrations in the future.
Geography: Drought is most affected in the African region, especially in the African Horn.
For more information (https://earthobservatory.nasa.gov/images/event/88589/long-term-drought-in-africa)
Cause/catalyst: Cause for drought in the African horn relates to climate change attribution. As spaceship earth's internal temperature rises the African zone, which is already known to hold the deepest layer of intense heating on Earth will only grow hotter. This aridness has a direct correlation to a decline in agriculture and is the reason for the emerging food crisis in the area.
Potential cascade effects: Adverse climate conditions throughout multiple zones on spaceship earth is projected to lead to 140,000,000 migrations by 2050. Consequences of migration include, violence in effected regions of climate change, 'sudden onset' migrations, and the creation of refugee centers which are prone to bring high levels of poverty, economic vulnerability, and NIMBYism to the hosting zones .
 Kumari Rigaud, Kanta, Alex de Sherbinin, Bryan Jones, Jonas Bergmann, Viviane Clement, Kayly Ober, Jacob Schewe, Susana Adamo, Brent McCusker, Silke Heuser, and Amelia Midgley. 2018. Groundswell: Preparing for Internal Climate Migration. The World Bank. Pg 2. https://openknowledge.worldbank.org/handle/10986/29461
 Fajth, V., Bilgili, Ö., Loschmann, C. et al. How do refugees affect social life in host communities? The case of Congolese refugees in Rwanda. CMS 7, 33 (2019). https://doi.org/10.1186/s40878-019-0139-1