Authorities in Poland are bracing for extreme rainfall and flooding in the coming days, as preparations against severe weather are also under way in neighbouring Czech Republic. According to Poland’s Meteorological Institute (IMGW), the highest alert level 3 is in place for the provinces of Lower Silesia, Silesia and Opole due to the expected continuous rainfall. In the city of Wrocław, Mayor Jacek Sutryk convened a crisis team because water levels in the Oder river are expected to rise to flood level. Two festivals planned for the weekend were postponed as a precaution. A third of Wrocław was…