The Italian Ministry of Health and climate research institutions have documented a sharp escalation in extreme heat exposure across the country, with more than 62% of summer days now exceeding the critical 32°C heat stress threshold—a level at which human physiology begins to suffer measurable damage. The shift, detailed in a new Greenpeace Italia report titled "L'estate che scotta," represents a near-doubling from the 39% recorded between 1991 and 2000.
Why This Matters
• Health Risk: Over 8.2 million people in regional capitals live in neighborhoods where summer surface temperatures regularly top 40°C, including 283,000 children under five and 1.1 million adults over 74.
• Geographic Hotspots: Puglia, Sicily, Basilicata, Emilia-Romagna, and Lombardy logged the highest share of extreme heat days in summer 2025.
• Policy Pressure: Five EU nations, including Italy, formally requested a bloc-wide windfall tax on fossil fuel companies in April 2026, though the European Commission declined to mandate one.
Urban Temperatures Hit Dangerous Peaks
Summer 2025 marked the fifth hottest on record since 1950, with a seasonal anomaly of +1.62°C above the 1991–2020 baseline, according to data from the Copernicus Climate Change Service and Italy's CNR-ISAC. June alone posted a staggering +3.53°C deviation, making it the second-warmest June since 1800, trailing only the legendary heatwave of 2003.
Ten of Italy's 20 regional capitals logged average maximum surface temperatures exceeding 40°C during the three-month period. Rome, Turin, and Cagliari pushed past 44°C at peak, figures that reflect land surface readings rather than air temperature but indicate the radiative intensity faced by pedestrians, cyclists, and outdoor workers. The zero-degree altitude—the height at which freezing begins—climbed to an unprecedented 5,113 meters in the Alps, accelerating glacier melt and straining water reserves across the Po Valley.
The season was punctuated by 17 distinct heatwaves, 14 of which qualified as extreme by meteorological standards, and 80 tropical nights when temperatures never dipped below 20°C. One event persisted for 14 consecutive days, sustaining 40°C readings in interior valleys and triggering widespread forest fires in Sicily, Sardinia, Calabria, and Puglia.
What This Means for Residents
The Italian National Institute of Statistics (ISTAT) data underpinning the Greenpeace report shows that vulnerability is highly localized. Roughly 87% of people living in regional capitals inhabit districts where summertime surface heat routinely breaches the 40°C mark. That translates to just over 8.2 million individuals, a figure that includes nearly 283,000 infants under five and more than 1.1 million elderly residents over 74—two demographics known to experience acute cardiovascular and renal stress during sustained heat.
Emergency room admissions for heat exhaustion, dehydration, and heatstroke climbed noticeably in 2025, with Milan and Rome recording the sharpest spikes. The Italian Ministry of Health operates a heat-health early warning system that issues daily bulletins during summer, yet hospital data suggest the alerts are not uniformly heeded, particularly in smaller municipalities lacking dedicated cooling centers or "climate refuges."
Climate researchers estimate that nearly 63,000 heat-related deaths occurred across Europe in summer 2024, with Italy accounting for a disproportionate share relative to population. While national adaptation programs have modestly reduced mortality compared to the early 2000s—thanks to public awareness campaigns and expanded air-conditioned public spaces—the absolute number of vulnerable people is rising as both the climate warms and the population ages.
Regional Disparities and Urban Heat Islands
Greenpeace's thermal mapping highlights stark intra-city contrasts. Turin exhibits the largest urban heat island effect in the country, with a +15.2°C difference between dense downtown zones and outlying green belts. L'Aquila follows at +15°C, and Trento at +13.9°C. These gradients are driven by impermeable asphalt, minimal tree cover, and narrow street canyons that trap radiant energy.
Southern regions—Puglia, Sicily, and Basilicata—face a different challenge: baseline summer temperatures already hover near or above physiological tolerance, leaving little margin for adaptation. Combined with chronic water scarcity, these areas saw extended irrigation bans in 2025 and crop losses that pushed wholesale vegetable prices up by double digits.
Precipitation patterns proved erratic. Northern Italy received 8.4% more rainfall than average, concentrated in violent August downpours that caused the Seveso River to overflow in Milan and the Rio Frejus to flood Bardonecchia. Meanwhile, the South endured below-normal precipitation, exacerbating wildfire risk and straining municipal water supplies. The Mediterranean Sea surface temperature averaged 20.73°C in 2025, the third-highest reading on record and +1.3°C above the 1980 baseline, accelerating evaporation and intensifying localized thunderstorms.
Government Response and Adaptation Efforts
Several Italian municipalities are advancing climate adaptation plans, though progress remains uneven. Bologna adopted one of the country's first comprehensive climate strategies in 2015 and is currently mapping public "climate refuges"—libraries, museums, and community centers offering free air conditioning during heatwaves. Alessandria launched a 2026 design competition to transform a central plaza into a shaded "climate oasis" with permeable surfaces and water features.
Urban forestry initiatives aim to boost tree canopy coverage by 5% across major cities, a threshold studies suggest can lower average surface temperatures by more than 0.5°C. Architects and planners are also exploring ventilation corridors that channel cooler air from surrounding countryside into dense neighborhoods, a technique pioneered in Stuttgart and now being piloted in Turin and Milan.
Yet Legambiente's "Città Clima 2025" report found that many mid-sized municipalities—those with populations between 50,000 and 150,000—still lack formal adaptation strategies. Funding constraints and bureaucratic inertia are cited as the main obstacles, particularly in southern regions where municipal budgets are already stretched by legacy debt.
The Italian Red Cross and Legambiente launched a joint campaign in 2026, "Clima e Salute – Cresce il caldo, cresce la prevenzione," distributing multilingual flyers on heat safety and identifying cooling centers in 150 towns. UNICEF reported that more than 7 million children in Italy are now exposed to recurrent heatwaves, prompting calls for mandatory shading in school playgrounds and restrictions on outdoor sports during peak afternoon hours.
Fossil Fuel Windfall Tax Proposal Stalls
Greenpeace Italia and allied environmental groups are pressing the Italian government to levy a windfall profits tax on oil and gas companies, channeling the revenue into renewable energy subsidies and urban climate resilience projects. The organization argues that fossil fuel firms are "principal drivers of global heating" and should bear a proportional cost for adaptation measures.
In April 2026, Italy joined Germany, Spain, Portugal, and Austria in formally requesting the European Commission to implement an EU-wide levy on excess fossil fuel profits, similar to the temporary "solidarity contribution" enacted in 2022 following Russia's invasion of Ukraine. That earlier measure, which taxed profits exceeding a four-year average by more than 20% at a minimum rate of 33%, was estimated to have generated €25 billion from petroleum and gas operators. Spain, Hungary, and the Czech Republic initially extended the levy beyond 2023 but later rescinded it amid industry lobbying and concerns over investment flight.
The Commission's April 2026 "AccelerateEU" package declined to mandate a new harmonized tax, instead leaving the decision to individual member states. Officials cited lack of unanimity: the Netherlands and Nordic countries worried such a levy could deter renewable energy investments, while Hungary, the Czech Republic, and Slovenia preferred fiscal autonomy. Greenpeace estimated that in March 2026 alone, EU-based oil companies reaped €81.4 million per day in windfall profits, driven by Middle East conflict-related price spikes that saw European gas costs surge more than 70% in six weeks.
Transport & Environment projected that major oil firms would book €24 billion in extraordinary profits across Europe in 2024, largely at motorists' expense. Advocates contend that recycling even a fraction of those earnings into heat adaptation infrastructure—cool roofs, district cooling networks, and emergency medical capacity—would meaningfully reduce mortality and hospital strain.
Long-Term Outlook and Policy Debate
Climate models indicate that without aggressive emissions cuts, the proportion of summer days exceeding 32°C could climb to 75% or higher by 2040. The Italian National Research Council projects that southern cities may experience sustained multi-week periods above 35°C, a threshold at which outdoor labor becomes medically inadvisable and agricultural productivity drops sharply.
Greenpeace is calling for a national gas phase-out plan by 2035, arguing that continued reliance on fossil fuels locks in future warming and diverts capital from renewable deployment. The Italian government has committed to expanding solar and wind capacity but has not set a firm end date for natural gas extraction or imports, citing energy security and industrial competitiveness concerns.
Public health experts emphasize that adaptation and mitigation must proceed in tandem. Expanding urban green space, retrofitting buildings with passive cooling, and ensuring equitable access to air conditioning can save lives in the near term, but only deep decarbonization will stabilize the climate system over the long run. With vulnerable populations—infants, elderly, outdoor workers, and socioeconomically disadvantaged communities—bearing disproportionate risk, the urgency of coordinated national and EU-level action continues to intensify.
