罕见！北极圈内城市气温高达30℃

Group 1 - The core viewpoint of the article highlights the unusual heatwave currently affecting Rovaniemi, Finland, where temperatures have reached around 30 degrees Celsius, similar to Southern Europe [1][3] - The Finnish Meteorological Institute reports that temperatures exceeding 30 degrees Celsius have been recorded in multiple regions of Finland, which is rare but becoming more frequent [3]