The United Nations, through a joint report by the World Health Organization (WHO) and the World Meteorological Organization (WMO), has issued a call for urgent action to protect workers from the escalating risks posed by extreme heat due to global warming. The report highlights that 2.4 billion workers worldwide, particularly those in outdoor and manual labor sectors such as agriculture and construction, are increasingly exposed to dangerous heat levels that threaten their health and reduce productivity. Health risks include heatstroke, dehydration, kidney dysfunction, neurological disorders, and accelerated biological aging. The year 2024 was recorded as the hottest year on record, intensifying these threats. The UN and WHO emphasize the economic necessity of implementing protective measures, including developing heat action plans, prioritizing vulnerable populations, raising awareness, and training responders. Without intervention, 540 million workers are projected to face heat-related occupational hazards by the end of the 21st century. The report urges governments and employers globally to adopt scalable, evidence-based solutions to mitigate the impact of heat stress and safeguard workers' health and economic stability.