Italy puts all 27 major cities on highest heat alert

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, according to the Guardian. The red alert comes as temperatures edge close to 40C in some areas, with the health ministry advising vulnerable residents to stay indoors during the hottest hours.

The measure covers every major urban centre on the peninsula, reflecting a summer that has already seen repeated heat alerts and growing concern over the strain on the country's energy grid and water supplies. The Guardian reported that the alert was issued as the heatwave continued to build across the week.

For Sardinia, the red alert carries particular weight. The island's interior, already parched after months of below-average rainfall, faces the double pressure of extreme heat and water scarcity, a pattern that has become familiar in Mediterranean climate reporting.

The Guardian's report noted that the red alert applies to all major cities simultaneously, a rare occurrence that underscores the breadth of the heatwave. The alert system, which uses a traffic-light scale, reserves red for the most severe conditions, when health risks are considered high even for the general population.

The summer of 2026 has already seen three earlier heatwaves, each prompting warnings about the impact on agriculture, tourism and public health. The fourth wave arrives as many Italians are on holiday in August, a month when coastal regions including Sardinia see their highest visitor numbers. Foreign press coverage has repeatedly linked the heat to wider concerns about climate change in the Mediterranean basin, where temperatures are rising faster than the global average.

Sardinia's interior, home to the island's pastoral economy and its famous longevity 'Blue Zone' in Ogliastra, is particularly exposed. The heat compounds an already dry season, and the island's reservoirs have been under watch in international reporting on Mediterranean drought. The red alert does not single out the island, but the conditions it describes are those that most strain the interior's fragile balance.

Health authorities have advised limiting outdoor activity during peak afternoon hours and checking on elderly residents. With temperatures near 40C, the risk of heatstroke and cardiovascular stress rises sharply, a concern echoed across the foreign wire's coverage of this summer's heat events.