A study by researchers at the University of Oxford assesses how exposed major cities are to extreme heat and how well populations can cope. The analysis covers 220 cities and evaluates factors including hazard exposure, vulnerability, and coping capacity. The researchers use these components to estimate which cities face the highest risk as El Niño conditions are expected to influence global weather patterns and increase the likelihood of extreme temperatures. The findings highlight that risk is not determined by heat alone; it also reflects social and infrastructure factors that affect how easily communities can prepare for and respond to heat events. The study points to several cities that are major tourist destinations as among those facing heightened risk. The reporting emphasizes that heat impacts can be more severe where vulnerability is higher and where coping resources—such as public health systems, emergency planning, and cooling access—are more limited. The study provides a cross-city comparison intended to inform preparedness efforts for extreme heat.