Europe braces for costly winter as Iran war pushes gas prices to 3-year highs

Europe has entered September with natural gas prices at their highest level in roughly three and a half years, as the ongoing war in Iran continues to disrupt global energy flows and squeeze the continent's ability to build adequate winter reserves. Dutch TTF futures, Europe's main gas benchmark, have surged more than 130% since the start of 2026, topping €65 per megawatt-hour in late August — the highest since the early weeks of the conflict.euronews

The rally arrives as EU gas storage sits well below historical norms, with inventories around 60% full in mid-August, the lowest for that point in the year on record. The EU's mandatory storage target has been relaxed from 90% to 80% for the 2026 winter season, and at the current injection pace, reserves are roughly on track to reach that threshold by November. But the margin for error is thin.spglobal+1

A Mounting Bill

The costs are piling up across the continent. The European Commission estimated in April that additional fossil fuel import costs had already reached €27 billion within just 60 days of the conflict. By June, that figure had climbed to roughly €47 billion, and more recent estimates from the Centre for Research on Energy and Clean Air put the global gross extra cost to fossil fuel importers at $330 billion over the first six months. The Netherlands, Italy, France, and Spain have borne the heaviest burdens within the EU.energyandcleanair+3

Businesses are responding by accelerating their use of corporate power purchase agreements to lock in electricity prices. According to the Institute for Energy Economics and Financial Analysis, spot market power prices in Germany and Italy have reached €120–150 per megawatt-hour during stress periods, while PPA prices currently range from €60–85/MWh — roughly half the spot rate. The shift has transformed PPAs from a sustainability instrument into a risk management tool.ieefa

Winter Outlook Remains Uncertain

In the United Kingdom, the energy regulator Ofgem London Stock Exchange announced on August 26 a 4% increase to the energy price cap from October, raising it to £1,723 for a typical household — an additional £60 per year. Wholesale prices have risen 11% over the past three months alone, driven by what Ofgem's director general for markets called "high international gas prices".aljazeera+1

"The consumer is going to be paying a 'risk premium' for energy supply," Jack Burt, a PhD candidate at the University of Cambridge researching novel forms of energy storage, told Al Jazeera.aljazeera

The European Central Bank faces its own dilemma. Oxford Economics estimates that eurozone headline inflation could run closer to 3.5% in the second half of 2026 under current gas pricing, with Italy identified as the most exposed large economy due to its combination of fast price transmission and heavy gas reliance. Markets widely expect another rate increase in September.euronews

Structural Vulnerability Exposed

The Strait of Hormuz, through which roughly one-fifth of the world's oil and LNG passed before the war, remains effectively closed. Norway has extended outages at gas fields, and summer heatwaves have curbed hydroelectric and nuclear generation, forcing gas-fired power stations to compensate at precisely the moment Europe needs to store fuel for winter.aljazeera+1

Europe has cut gas consumption by 15–20% compared with 2021, expanded renewables, and built more LNG import capacity. But as Oxford Economics noted, the relationship between temperature and gas demand remains "almost perfect" — last winter, a brief cold snap narrowed the continent's savings to just 5–10% below pre-crisis levels. A cold winter could turn an expensive problem into a severe one.euronews