The very active North Atlantic hurricane season, major monsoon floods in the Indian subcontinent, and continuing severe drought in parts of east Africa contributed to 2017 being the most expensive year on record for severe weather and climate events. The high impact of extreme weather on economic development, food security, health and migration was highlighted in the WMO Statement on the State of the Global Climate in 2017. Compiled by the World Meteorological Organization with input from national meteorological services and United Nations partners, the report provides detailed information to support the international agenda on disaster risk reduction, sustainable development and climate change.