Córdoba heat study: Orange trees most vulnerable among 17 urban species, UCO finds

A new University of Córdoba (UCO) analysis of 17 tree species in the city's urban landscape has identified the orange tree as one of the most vulnerable to extreme heat. The findings offer a data-driven guide for planners aiming to build climate-resilient green spaces in southern Spain, where summer temperatures regularly exceed 40°C. By measuring physiological stress indicators across common species, researchers ranked heat tolerance, revealing that iconic citrus trees may struggle as heatwaves intensify. This matters because urban trees cool streets, improve air quality, and reduce energy demand—but only if they survive. The study encourages diversifying species and prioritizing heat-hardy varieties in future planting schemes. Córdoba's experience could inform other Mediterranean cities facing similar warming trends. As climate models predict hotter, longer summers, selecting the right trees today will shape livable cities tomorrow.