Hot weather

Red dot heat until mid-August, record high tomorrow with alert 3 in 22 cities

Yellow alert for bad weather today in Piedmont, Valle d'Aosta and Alto Adige. In Piedmont zero temperature at 5,206 metres, record close to being reached

Aggiornato il 13 agosto 2024 ore 8:00

Turisti e fedeli cercano refrigerio dal forte caldo in piazza San Pietro, Città del Vaticano, 11 agosto 2024. 
ANSA/ANGELO CARCONI

3' min read

3' min read

The heat peak arrives. Today the number of red dot cities rises to 19. And tomorrow there will be 22. Yellow alert for bad weather today in Piedmont, Valle d'Aosta and Alto Adige. So, the days leading up to August bank holiday will be scorching hot, in a crescendo that will reach its climax on the eve of the holiday, Wednesday 14 August, with a record 22 cities on the red dot from North to South.

According to the Ministry of Health's latest bulletin on heatwaves, on Monday 12 August, an alert level 3 (the highest level) was predicted for 17 capitals - out of 27 monitored: Ancona, Bologna, Bolzano, Brescia, Cagliari, Campobasso, Florence, Frosinone, Genoa, Latina, Palermo, Perugia, Rieti, Rome, Turin, Trieste and Verona. Also on the 12th, five other centres were expected to receive an orange alert - Bari, Milan, Naples, Venice Viterbo - and five others a yellow alert (Catania, Civitavecchia, Messina, Pescara, Reggio Calabria).

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Today, 13 August, the number of red dot cities will rise to 19: Milan and Naples will be joined by Ancona, Bologna, Bolzano, Brescia, Cagliari, Campobasso, Florence, Frosinone, Genoa, Latina, Palermo, Perugia, Rieti, Rome, Turin, Trieste and Verona. The orange sticker remains for Bari, Venice and Viterbo, while the yellow stickers remain unchanged.

On the 14 August, the map of Italy will be dotted almost entirely with red dots, if we take out the five centres that remain yellow dots even on the eve of the August bank holiday: the highest level of alert will also affect Bari, Venice and Viterbo - in addition to Ancona, Bologna, Bolzano, Brescia, Cagliari, Campobasso, Florence, Frosinone, Genoa, Latina, Milan, Naples, Palermo, Perugia, Rieti, Rome, Turin, Trieste and Verona - for a total of 22 cities.

Sima del Bianco above zero for 33 hours in a row

The heat that is affecting Italy was also felt at the summit of Mont Blanc, which measures 4,805 metres. "The air temperature, recorded by the automatic weather station located at Colle Major at 4,750 metres above sea level, remained above zero for 33 consecutive hours, from midnight on 10 August to 9am on 11 August." Thus in a post Arpa Valle d'Aosta. Such high temperature values 'were also recorded, for more limited periods, on 5 August (five consecutive hours), 18 and 30 July'.

The current 'persistence of high temperatures at high altitudes,' Arpa Valle d'Aosta emphasises, 'is responsible for the intense glacial melting and the rapid reduction in snow cover, which this year had raised hopes for the health of the glaciers in Valle d'Aosta. The temperature data reported is 'an hourly average, measured by two different thermo-hygrometers, installed within shade screens according to standards'.

Thermal zero at 5,206 metres in Piedmont, record close

The zero temperature in Piedmont reached an altitude of 5,206 metres, touching the record of nine years ago, when it had risen to 5,296 metres. This is the figure recorded last 10 August, with a radio sounding, at Cuneo Levaldigi by Arpa (Regional Agency for Environmental Protection). Also very close to the record was the maximum temperature measured at the Capanna Margherita, on Monte Rosa: at an altitude of 4,554 metres, the thermometer reached 9 degrees, two-tenths less than the 9.2 degrees recorded last summer, three-tenths below the record, 9.3 degrees, of 2015. The snow that still covered the glaciers turned into water, accelerating the melting of the glaciers: "From Capanna Margherita, where Arpa Piemonte has a weather station that is the second highest in Europe and is the highest observatory in Europe," explains Secondo Barbero, director general of Arpa Piemonte, "it can be observed that the abundant snow cover still present at high altitudes is transforming and reducing rapidly, releasing large quantities of melt water; the ice free of snow is exposed to strong melting, contributing to the reduction of glacial masses. In Piedmont, two more days of great heat, with real highs of 34 degrees (37 perceived) then a drop of 2-3 degrees is expected.

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