Gas demand has fallen after the end of the winter heating season, but European utilities are racing to refill storage ahead of next winter with prices high and supplies uncertain.

Russian natural gas deliveries through a key pipeline to Europe will drop by around 40% this year, state-controlled energy giant Gazprom said Tuesday, after Canadian sanctions over the war in Ukraine prevented German partner Siemens Energy from delivering overhauled equipment, reports AP

Germany’s utility network agency said it did not see gas supplies as endangered and that reduced flows through the Nord Stream 1 pipeline under the Baltic Sea aligned with commercial behavior and Russia’s previously announced cutoff of gas to Denmark and the Netherlands, the German news agency dpa reported. The Federal Network Agency said it was monitoring the situation.

Spot gas prices rose in Europe, a sign of jitters over possible further effects of the war on supplies of Russian gas, which powers industry and generates electricity on the continent.

The European Union has outlined plans to reduce dependence on Russian gas by two-thirds by year’s end. Economists say a complete cutoff would deal a severe blow to the economy, consumers and gas-intensive industries.

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