United Nations Secretary-General António Guterres warned leaders to come to an upcoming climate summit with concrete plans to stem climate change, as the U.N. presented a new report by the World Meteorological Organization on Thursday.

Secretary-General António Guterres: “Every week brings a new example of climate-related devastation. No country or community is immune. And as is always the case, the poor and vulnerable are the first to suffer and the worst hit. … Global climate marches are sending a clear message. Young people are demanding that today’s leaders act on behalf of future generations. I echo that demand.”