(Investing) – European natural gas futures inched higher on Friday, steadying after days of volatile trading as benchmark contracts prepared to cap a fourth consecutive week of gains after surging past conflict-driven highs to touch their highest levels since 2023.The front-month Dutch TTF contract rose modestly on the session, holding near 72.50 euros per megawatt-hour (MWh) and putting the continental benchmark on track for a weekly gain of over 8%. In Great Britain, the equivalent NBP wholesale gas contract similarly held firm near 179 pence per therm, capping a weekly advance of over 9% as UK traders played catch-up following Monday’s bank holiday. The sustained weekly advance underlines a deep-seated geopolitical risk premium embedded across forward curves. Energy desks continue to re-price winter supply commitments after direct military strikes between U.S. forces and Iran effectively crippled commercial tanker transit through the Strait of Hormuz earlier in the week.While Washington maintains that international shipping lanes remain open, satellite tracking data reveals that commercial vessel traffic through the strategic bottleneck is operating at a small fraction of normal pre-war levels. The effective maritime blockade directly threatens approximately 20% of global liquefied natural gas (LNG) supplies, predominantly originating from major producer Qatar. With U.S. President Donald Trump warning of harder retaliatory strikes against Iranian infrastructure – and threatening targeted actions against Kharg Island – trading desks see little immediate prospect for a diplomatic breakthrough.As a result, European utilities are being forced into intense bidding wars against Asian buyers to secure replacement seaborne Atlantic basin cargoes, establishing a elevated structural floor under global LNG spot prices. Storage injection shortfalls elevate winter vulnerabilityThe geopolitical shock comes at a critical juncture for European energy infrastructure as the continent enters the final stages of its summer injection season ahead of winter heating demand.Data from Gas Infrastructure Europe indicates that European underground storage caverns are currently filled to roughly 62% of capacity – lagging the five-year seasonal benchmark.A combination of intense summer heatwaves driving gas-fired power generation across Southern Europe, routine offshore pipeline maintenance in Norway, and delayed Qatari LNG shipments has severely constrained storage replenishment throughout August.Energy shock keeps European Central Bank on high alertThe sustained multi-week rally in European natural gas – coupled with Brent crude holding firm past $90 a barrel – has reinforced cost-push inflation fears across European industrial and retail sectors.Surging energy input costs complicate the policy landscape for the European Central Bank (ECB) as its Governing Council prepares to meet on Sept. 10. While preliminary August data showed Eurozone core inflation easing slightly to 2.4%, headline CPI accelerated to 3.3% year-on-year, driven primarily by a 14.3% surge in energy components. The persistence of energy-driven price pressures keeps pressure on European policymakers to maintain a hawkish posture, as central bankers weigh the risk of unanchored price expectations against signs of slowing regional economic growth.