A new report from the World Health Organization (WHO) and the World Meteorological Organization (WMO) report warns that rising heat waves are threatening millions of workers worldwide, affecting health and productivity. “It is not just discomfort. It is a real health risk,” WHO’s director of environment, climate and health Rudiger Krech told the BBC, citing dangers such as heatstroke, kidney failure, and dehydration.

The report shows productivity drops 2 percent for every degree above 20°C, while workplace accidents rise during extreme heat. Construction and agricultural workers are particularly vulnerable, prompting some European countries to pause work during peak temperatures.

Schools also need adaptation. Krech told the BBC that even uniforms should be reconsidered to help children cope with heat. He stressed that investing in adaptation now could prevent greater losses in health and productivity later.