PARIS — In Northern Europe, this summer feels like a modern-day version of the biblical plagues. Cows are practically dying of thirst in Switzerland, fires are gobbling up timber in Sweden, the majestic Dachstein glacier is melting in Austria.

In London, stores are running out of fans and air-conditioners. In Greenland, an iceberg may break off a piece so large that it could trigger a tsunami that destroys settlements on shore. Last week, Sweden’s highest peak, Kebnekaise mountain, no longer was in first place after its glacier tip melted.

Southern Europe is even hotter. Temperatures in Spain and Portugal are expected to reach 105-110 degrees Fahrenheit this weekend. On Saturday, several places in Portugal experienced record highs, and over the past week, two people have died in Spain from the high temperatures, and a third in Portugal.

But in the northernmost latitudes, where the climate is warming faster than the global average, temperatures have been the most extreme, according to a study by researchers at Oxford University and the World Weather Attribution network.