As acute food insecurity levels appear to be reaching new highs globally, also as a result of the socio-economic fallout of measures imposed to contain the spread of Coronavirus disease 2019 (COVID-19), this joint FAO-WFP report aims to raise an early warning on 20 countries and situations - called hotspots - that, starting from already significant levels of acute food insecurity in early 2020, are facing the risk of a further rapid deterioration over the next months. Through a forward-looking analysis on potential evolutions of food insecurity drivers, this report aims to inform urgent action to safeguard the most vulnerable communities in the countries covered.