Between June 30 and July 2, 2025, a powerful heat dome brought temperatures above 40 °C (104 °F) to much of southern Europe, forcing widespread school closures, labor restrictions, and triggering public health emergencies across France, Italy, Spain, and Portugal.
🇫🇷 France Issues Red-Level Alert
In France, Météo-France issued red-level heat alerts in 16 departments and orange alerts in 68 others. Temperatures reached 40–41 °C (104–106 °F) in central and southern regions. In response:
- The Ministry of Education closed more than 1,350 schools, including large numbers in Île-de-France, Troyes, and Melun.
- Around 200 additional schools were shut down by municipal authorities.
- The top platform of the Eiffel Tower was closed to tourists for safety reasons.
- Energy demand surged, leading to increased strain on the national grid.
🇮🇹 Italy Enforces Work Bans, Heat Claims Lives
In Italy, at least 13 regions implemented outdoor work bans between 12:30 and 16:00 LT, including Lazio, Tuscany, Emilia-Romagna, Lombardy, and Sicily. The bans, in effect until August 31, are based on INAIL–CNR Worklimate risk assessments. Lombardy’s restrictions will remain until September 15.
Violations carry administrative fines under Italy’s labor safety regulations. Affected sectors include agriculture, construction, and floriculture.
The heatwave has claimed at least two lives:
- A 47-year-old construction worker died near Bologna.
- A 70-year-old man drowned in Piedmont during a storm related to heat-driven instability.
Additionally, two workers collapsed in Vicenza—one remains in critical condition.
Intermittent blackouts occurred in cities like Milan, Florence, Rome, and Bergamo, caused by transformer failures and excessive air conditioning demand. Authorities set up cooling shelters, and public transport faced delays and service interruptions.
🇪🇸 Spain and 🇵🇹 Portugal Break June Heat Records
In Spain, AEMET confirmed that June 2025 was the hottest on record, with an average temperature of 23.6 °C (74.5 °F).
- Barcelona saw highs above 40 °C (104 °F).
- Southern areas neared 46 °C (115 °F).
In Portugal, Santarém hit 46.6 °C (116 °F) on June 29, pushing infrastructure to the limit.
Mediterranean Sea Surface Heating Raises Alarms
The Mediterranean Sea recorded surface temperatures as high as 30 °C (86 °F) — 3–6 °C (5.4–10.8 °F) above normal. Marine experts warn this can exacerbate marine heatwaves, hurricane-like medicanes, and further fuel coastal storm systems.
