Rift Valley fever (RVF) is an endemic vector-borne zoonotic disease that represents a threat to human health, animal health, and livestock production, in the Eastern Africa Region and has also occurred in Mauritania. The epidemiology of RVF is complex, making monitoring of RVF risk and carrying out efficient and timely control measures challenging. To increase knowledge on RVF epidemiology and inform disease management policies, FAO has developed and maintains a web-based RVF Early Warning Decision Support Tool (RVF DST) for near real-time RVF forecasting based on habitat suitability modelling and environmental factors for vector amplification. To this end, FAO, in partnership with the Intergovernmental Authority on Development (IGAD), has been alerting the countries at risk through joint alert messages about the increased risk and what needs to be done to mitigate the risk.