Emergency responders in the Czech Republic and Poland were grappling with flooding on Saturday while Austria declared some areas disaster zones amid historic rainfall in central Europe and as forecasters warned that worse is ahead. Emergency forces in both countries, along with parts of Austria, have been preparing for severe weather since Friday. Heavy rains in the Czech Republic led the Elbe river to rise, with the Czech weather service reporting up to 170 millimetres of precipitation in the worst affected regions in the previous 24 hours. Authorities have issued the highest flood alert leve…