Medellín Green Corridors Cut City Heat, Offer Blueprint for Monza

Medellín, Colombia, created a network of "green corridors"—trees, shrubs and vegetation planted along streets and waterways. The initiative lowered average temperatures in the treated areas by about 2 °C and was funded with an initial $16.3 million investment, roughly $6.50 per resident, according to data from the World Economic Forum.

Italian city planners are examining whether the same approach could be adapted for Monza, a densely built Italian city of about 123,000 inhabitants (3,700 people per km²). Monza’s climate strategy highlights the urban heat island effect caused by extensive asphalt, cement and impermeable surfaces. Connecting existing green spaces rather than building new large parks is being discussed as a way to provide shade, reduce surface heating and harness evapotranspiration to cool the city.

The Medellín model illustrates how existing vegetation can function as urban infrastructure, offering a potential low‑cost strategy for Monza and other similar cities to mitigate summer heat.