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On July 15, 2021, the number of flood warnings in Switzerland peaked at 5 in some parts of central Switzerland. Source: Portal on Natural Hazards. Long and intense rain on the northern slopes of the Alps and surrounding areas, as well as in the northwest of Switzerland, has led to a critical flood situation, the federal government warns on its natural hazards portal. On Thursday and Friday, intense precipitation of 40 to 80 mm is expected on the northern slopes of the Alps and adjacent areas, as well as in northwestern Switzerland. This rain on top of previous rainfall means that there is a very high risk of flooding in Lake Biel, Lake Thun and Lake Lucerne (hazard level 5).
