Milan's Sala joins Paris and Phoenix mayors in heat crisis plea

Milan's mayor Giuseppe Sala has joined the mayors of Paris and Phoenix in a joint appeal published in the Guardian, arguing that the heat crisis confronting major cities is fundamentally a public health emergency that demands coordinated urban policy.

Writing from London, where the three mayors met during a heatwave that threatened to disrupt Climate Action Week, Sala and his counterparts Emmanuel Grégoire and Kate Gallego described how their cities are learning from each other about protecting residents from rising temperatures.

The op-ed casts climate adaptation not as an environmental luxury but as a core municipal responsibility, with each city bringing distinct experience to the table: Phoenix's desert extremes, Paris's heatwave planning, and Milan's efforts to cool a densely built northern Italian metropolis.

For Milan, the intervention comes as the city confronts the practical consequences of a warming climate in a region unaccustomed to prolonged heat. Lombardy's continental climate, with its hot humid summers, has made urban cooling a pressing concern for the Sala administration, which has overseen tree-planting programmes and public fountain schemes in recent years.

The Guardian piece frames these policies as public health measures first and foremost, a framing that resonates in Milan where heatwaves have historically hit the elderly and the urban poor hardest. The city's position as Italy's financial and business capital gives its climate agenda an economic dimension, as prolonged heat affects productivity and energy demand across the Lombardy economy.

The mayors' meeting in London during a record-breaking European heatwave underscored the timing of their appeal. With temperatures across the UK and Europe reaching unprecedented levels, the three city leaders argued that no single municipality can address the crisis alone, advocating instead for a cross-continental exchange of effective strategies.

Sala's participation in the joint op-ed marks a rare instance of an Italian mayor engaging directly in international climate diplomacy through the foreign press, amplifying Milan's role as a testbed for urban heat adaptation in a country where national climate policy has often lagged behind municipal initiatives.

The appeal stops short of specific new policy commitments, but its publication in a major international outlet signals an intent by the three mayors to keep urban heat on the agenda as European and American cities head into what meteorologists warn could be a prolonged period of extreme weather.