Italy's 27 cities under red heat alert as fourth wave peaks

Italy is to place all of its 27 major cities, from Trieste in the north to Palermo in the south, under the highest heat alert as the fourth heatwave to hit the country this summer intensifies, the Guardian reported on Wednesday. The red alert covers every major urban centre, including Turin, Milan and Rome, with temperatures in some areas edging close to 40C.

The measure reflects a summer that has already seen three previous heatwaves strain Italy's infrastructure, energy grid and public health system. For Piedmont's capital, the alert carries particular weight: Turin's continental climate, with cold winters and warm, humid summers, makes prolonged high temperatures a test for a city whose industrial heritage left it with dense urban fabric and limited green space.

The Guardian's report did not specify how long the red alert would remain in force, but noted the heatwave was intensifying across the country. Local authorities in the affected cities typically respond by opening cooling centres, extending public pool hours and advising residents to stay indoors during peak afternoon heat.

The red alert for all 27 cities marks an escalation from earlier this summer, when alerts were issued region by region as each heatwave moved across the country. The Guardian's report said the fourth wave was intensifying, with temperatures in some areas approaching 40C — a threshold that triggers additional health warnings for vulnerable populations, particularly the elderly and those with pre-existing conditions.

For Turin, the heat compounds pressures on the region's economy. Piedmont is home to automotive and aerospace engineering plants, including Stellantis facilities that operate continuous production lines. High temperatures raise electricity demand for cooling, testing a grid already under strain from the broader European heatwave that has prompted emergency measures elsewhere on the continent, including Romania's use of explosives to clear a Danube rock and maintain water flow for nuclear cooling.

The regional dimension extends to the Alps, Piedmont's northern border. The heatwave has accelerated glacier melt in the mountain range, a recurring theme in international climate coverage of Italy. While the Guardian's report focused on urban alerts, the broader pattern of successive heatwaves has raised concerns among foreign analysts about the long-term viability of Alpine water resources that feed the Po basin, on which Piedmont's agriculture and industry depend.

The civil protection machinery for heat alerts is well established in Italy, with the health ministry issuing colour-coded warnings — yellow, orange and red — based on forecast temperatures and humidity. A red alert, the highest level, indicates conditions that pose a risk to the entire population, not just vulnerable groups. The Guardian noted the move came as the fourth heatwave of summer intensified, suggesting further alerts may follow if temperatures continue to climb.

Foreign press coverage has increasingly framed Italy's summer heatwaves as a structural challenge rather than a seasonal anomaly. The BBC, in a separate guide published this week, quoted experts advising tourists and residents on how to avoid the worst of the heat, including visiting museums during cooler evening hours and seeking refuge in air-conditioned supermarkets. For Piedmont's tourism sector, which draws visitors to the Langhe wine region and the Alpine valleys, the heat poses a practical question of how to keep visitors comfortable without sacrificing the region's appeal.