Cholera is endemic in Yemen. Between 2016 and 2017, two waves of cholera hit Yemen. Although the disease was subsequently brought under control, health authorities and medical organisations have continued to see cholera cases in almost all governorates of the country since the end of the last outbreak. This year, MSF has admitted around 10,000 suspected cholera cases to its health facilities in Amran, Hajjah, Sanaa, Ibb and Taiz governorates, 59% of them coming from Ibb governorate (data: 1 January to 1 May 2019). Between January and March, the number of cholera patients treated by MSF increased from 140 to 2,000 per week, which indicated a rapid and worrying increase, particularly because it happened before the start of the rainy season. Following this strong increase, we scaled up our response in March: teams opened a 50-bed cholera treatment centre in Khamer; increased the bed capacity of the cholera treatment unit in Taiz; bolstered centres in Ibb and Kilo; and opened a cholera treatment centre in Al Kuwait hospital in Sana’a. By May 2019, the number of cholera cases has fallen sharply across the country, and the situation seems less critical than expected.