(Bloomberg) -- European natural gas prices rose as much as 3.3% after Norway extended capacity reductions at several facilities that help bring the fuel to Europe.

Shipments from Norway are set to decline further on Tuesday, with reduced supplies to both the UK’s Easington and Belgium’s Zeebrugge terminals. 

The curbs, caused by an incident at the Sleipner field, are expected to last until Wednesday, according to data from network operator Gassco. The outage also impacted the Kollsnes and Nyhamna processing plants in Norway, which have been hit by heavier reductions than what was announced on Monday. 

Lower Norwegian flows coincide with a halt of Russia’s key Nord Stream pipeline for planned maintenance, squeezing supply at a time when nations rush to fill storage sites for the winter and a heatwave boosts demand for electricity to cool homes. The UK, where temperatures are well above seasonal norms, has seen higher generation than normal from gas-fired power plants for this time of the year in recent days. 

Read: London Hit With Dangerous Heatwave That Could Get Worse 

Meanwhile, Russia hasn’t increased supplies via Ukraine while the Nord Stream link is shut. Questions also remain as to how much gas Gazprom PJSC will deliver after the maintenance ends next week. 

Dutch front-month gas, the European benchmark, was 2.1% higher at 168 euros per megawatt-hour by 8:24 a.m. in Amsterdam. The contract has more than doubled in value over the past month. 

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