(Bloomberg) -- Northern Europe will see the return of milder weather next week, as the first cold blast of winter fades. 

London is forecast to reach 7.5 degrees Celsius on Monday, above the seasonal average, Maxar Technologies Inc. said in a report. In the meantime, yellow weather warnings remain in place for parts of the UK, including one for ice in London and southeast England, following heavy snow on Sunday evening.

Freezing temperatures across Europe are sending energy demand and prices soaring as grid operators pay power stations to keep the region’s homes warm. That’s coming at a high cost to consumers, even with government caps on energy bills. The UK faces temperatures about 6 degrees Celsius below normal for the rest of this week, after the tightest day of the year for its electricity grid. 

The outlook for a thaw will provide relief for many European power grids, but the Nordics are expected to remain somewhat unseasonably cold. The temperature in Stockholm next Tuesday is forecast to be as low as -1 degrees Celsius, keeping pressure on the Swedish grid.

On Monday, grid operator Svenska Kraftnat put the oil-fired plant Karlshamn-2 into operation in case emergency power was needed. The country’s biggest nuclear plant Oskarshamn-3 is shut for repairs until Dec. 18, while the Ringhals-4 reactor is down until Feb. 23.

• Nordic weather forecast for the next two weeks:

The cold weather and reactor maintenance, combined with low wind generation, saw energy prices soar on Monday. 

Wind output in Germany is forecast to pick up early next week, reaching as high as 44,604 megawatts at 3 a.m. on Tuesday.

Temperatures in southern Europe are expected to remain above the 30-year average, with a high of 14 degrees Celsius in Marseille on Tuesday.

• For Bloomberg’s weather functions, see WFOR and EFOR

--With assistance from Todd Gillespie.

(Updates with soaring energy prices and demand in third paragraph)

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