On average, sub-Arctic Fennoscandia sees up to two days of ‘strong’ heat stress per year. Last July there was almost two weeks of strong heat stress 🥵 heatwaves like this highlight the impacts of climate change and potential for hazardous heat in regions where it was historically rare or absent ⬇️
️🌡️ In July 2025, sub-Arctic Fennoscandia saw its longest and most severe heatwave on record: a 21‑day event with temps ≥30°C near and within the Arctic Circle leading to ‘strong’ heat stress, severe drought and high fire danger.
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@ecmwf.int @wmo-global.bsky.social
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