The year 2024 was the hottest measured, with global surface temperatures averaging 1.55 degrees Celsius above pre-industrial levels, culminating a decade-long "extraordinary streak of record-breaking temperatures", the United Nations said Friday.

While this does not mean the internationally-agreed 1.5C warming threshold has been permanently breached, UN chief Antonio Guterres said the "blazing temperatures in 2024 require trail-blazing climate action in 2025".