Freezing temperatures are spreading across Europe, with snow forecast from Germany to the UK, testing energy systems in a second winter without the bulk of Russian fuel supplies.

Berlin is set for a low of -4.5C on Tuesday and Wednesday, while Helsinki won’t get above -8C on Monday, according to forecaster Maxar Technologies Inc. Weather warnings have been issued for some areas of Germany today, where the nation’s meteorological agency expects as much as 20 centimeters (8 inches) of snow.