The U.N. has warned the world is facing its biggest humanitarian crisis since 1945. It issued a aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent for all aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent to help avoid "a aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent ". U.N. Emergency Relief Coordinator, Stephen O’Brien, said over 20 million people face the aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent of starvation in Kenya, Nigeria, Somalia, South Sudan and Yemen. He stressed there was an aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent need for, "accelerated global aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent to support U.N. humanitarian action on the aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent ". He added: "We stand at a aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent point in history. Already at the beginning of the year we are facing the aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent humanitarian crisis since the aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent of the U.N." The U.N. warned of aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent for millions in the affected countries. It said: "Without aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent …global efforts…people risk starving to aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent ." It warned of disease, of children with stunted aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent , of "lost futures, mass displacements and reversed development aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent ". The El Niño weather phenomenon has brought aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent rain, but a lot of the problems are man made. Conflicts are displacing many people. There are aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent of aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent convoys being attacked. Mr O'Brien said: "It is possible to avert this crisis, to avert these aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent …these looming human catastrophes. It is all aid catastrophe collective creation critical death efforts famines gains ground growth largest little misery nations plea preventable reports threat urgent ."