Abstract
The climate emergency is a humanitarian and health crisis. Extreme weather events, heat stress, declining air quality, changes in water quality and quantity, declining food security and safety, and changes in vector distribution and ecology threaten all of us. As the planet heats, climate risks are increasingly complex, frequent, and unpredictable, compounding existing vulnerabilities and inequities within populations and causing emergencies that cascade across different systems and sectors. Humanitarian agencies are now seeing how these problems are putting millions of people across the world at immediate risk of famine and death.