More than $3.2 billion is required for the Yemen humanitarian response in 2020. At the High-Level Pledging Event in Riyadh held on 2 June, donors pledged only US$1.35 billion of the $2.41 billion needed to cover essential humanitarian activities between June and December, leaving a gap of more than $1 billion. With only $558 million provided so far, the aid operation is on the brink of collapse.