Table 1. Predictors of RVFV transmission and spread.

	Name	Description	Source	Role in RVFV epidemiology
Local RVFV Cycle	hydrodist	Distance from water sources	Vmap0	Surface water bodies are favorable locations for mosquito reproduction and contact between mosquitoes and ruminants at watering and resting time [17].
	Rfe	Cumulative rainfall intensity during the rainy season in Senegal (June-October)	TAMSAT daily dataset	Rainfall intensity and patterns essential in RVF epidemiology, for filling temporary ponds and starting mosquito reproduction [18]
	nevents	Number of dry spells during the rainy season (July to October), defined as time intervals > 10 days between ≥10-mm precipitations	TAMSAT daily dataset
	NDVI	Availability of breeding and resting sites for mosquitoes	Normalized Difference Vegetation Indices	Higher values of NDVI reflect a higher vegetation coverage and potentially a higher availability of breeding and, especially, resting habitats for mosquitoes [19]
	minlst	Minimum Night land surface temperature	USGS	Mosquito activity and within-mosquito development of RVFV are related to temperature [20]
	Cattle, small ruminants	Density of cattle and small ruminants (log)	Gridded Livestock of the World, version 3.1	Principal animal hosts [21]
	Logdrat	Ratio small ruminants and cattle population	Gridded Livestock of the World, version 3.1
RVF spread	logHmd	Human density (logarithm)	Afripop	The denser the human population, the stronger the demand for red meat—especially sheep in Senegal, thus resulting in more intense livestock trade. [22]
	logTrav2	Travel time needed to cross a one-km pixel (log). Accessibility defined as the inverse of travel time.	JRC database	Travel time is lower where human activities—including livestock trade, are more intense [23]
	Lcd2	Least cost distance between point and municipality centroids with direct connection to Mauritanian cases via incoming ruminant trade	Data collected by Veterinary Services on livestock mobility	RVFV could have been introduced during the 2013 epidemics in Mauritania, increasing the risk of exposure in the municipality directly connected [24]