NEW : 13 people are dead across the Czech Republic , Germany and Austria . NEW : About 25,000 people died in Germany , mostly in Czech Republic , officials say . The floods are thought to be the worst since August 2002 , when swaths of Germany , the Czech Republic , Austria , Slovakia , Russia and Romania were submerged . The swollen Danube River threatens cities in Slovakia . A cleanup operation has begun in southern Bohemia .
NEW : 13 people are dead across the Czech Republic , Germany and Austria . NEW : About 25,000 people died in Germany , mostly in Czech Republic , officials say . The swollen Danube River threatens cities in Slovakia . A cleanup operation has begun in southern Bohemia .