The Arctic Climate Change Update 2024: Key Trends and Impacts. Summary for Policy-makers offers an overview of the accelerating climate transformations in the Arctic. This concise 16-page report synthesizes the latest scientific findings on critical issues such as permafrost thaw, ocean acidification, hydrological shifts, and the increasing frequency of extreme events like wildfires. Notably, the report emphasizes the Arctic’s rapid warming—up to four times the global average—and its cascading effects on ecosystems, Indigenous communities, and global climate systems. It also explores the intricate linkages between Arctic changes and mid-latitude weather patterns, underscoring the global implications of Arctic climate dynamics. Designed to inform and guide policymakers, the summary distills complex scientific data into actionable insights, reinforcing the urgency for targeted climate strategies and international cooperation to mitigate and adapt to the profound changes unfolding in the Arctic region.