The intensification of the Russo–Ukrainian war started in February 2022 with the Russian invasion of Ukraine has generated a dramatic increase in the price of several goods. In particular, energy, gas and oil have been the most interested by this spike in prices, followed by several agricultural commodities. Fertilizers, whose production is energy intensive and/or directly dependent from oil derivatives, have also experienced a sharp increase in prices. This has risen concerns for food insecure countries, particularly in Africa, since, besides a lower possibility to purchase food commodities on the international market, they will likely decrease their own production due to a lower utilization of fertilizers. Quantifying this potential decrease in agricultural production is important in order to fully assess their vulnerability in terms of food security. The present paper tries to accomplish this task by forecasting the change in maize production in 2022 and 2023 compared to 2021 in seven Western African countries. We find an overall decline in maize production of 10% circa in both years with a strong heterogeneity among countries. Trivial users of fertilizers, such as Niger, experience a very modest decline in production (less than 2%) whereas others, such as Benin and Togo, have a double digit decline: approximately 13% the former and 32% the latter.