A US agency that normally deals with major emergencies and natural disasters has been brought in to help care for the rising numbers of migrant children arriving at the US southern border. The Federal Emergency Management Agency (Fema) would “help receive, shelter and transport the children” for the next 90 days, it was announced. President Joe Biden has been reversing some of his predecessor’s policies. But the recent surge of arrivals is putting pressure on processing systems. There were a record number of children – 3,200 – being held in US immigration facilities on the US-Mexican border as of 8 March.