A closer look

Tropical diseases are packing their bags and moving to the suburbs. Dengue fever, notoriously known as "breakbone fever" due to the agonizing joint pain it inflicts, was historically confined to the equator. But as global temperatures steadily rise, the Aedes aegypti mosquito has rapidly expanded its geographical hunting grounds. These vectors are now surviving winters in previously frozen climates, thriving in urban water puddles from Paris to Florida. Epidemiologists warn that this climate-driven migration is transforming localized tropical infections into a massive, unprecedented global health crisis.