WHO and the World Meteorological Organization issued new guidance to protect workers from increasing heat stress. With climate change driving more frequent and intense heatwaves, the report synthesises evidence and provides practical measures for governments, employers and unions. WHO notes that 2024 was the hottest year on record and that daytime temperatures above 40–50 °C are becoming more common, harming health and productivity. High‑risk sectors include agriculture, construction, mining and fisheries. Recommended measures include heat‑health action plans, work–rest cycles, access to cool drinking water, shaded rest areas, acclimatisation protocols, PPE adjustments, and medical monitoring for vulnerable workers. The guidance emphasises equity, noting disproportionate impacts on low‑income populations, migrants and children, and frames protection from extreme heat as both a health imperative and an economic necessity requiring cross‑sectoral coordination. (Source: WHO/WMO)