The worst floods in 150 years have receded in Dresden, but the cleanup will take weeks. Floods submerged historic squares and damaged much of the restored city, but in an effort to show that things are returning to normal, the Abertinium museum, which houses one of the world’s great collections of precious stones, was scheduled to reopen by Aug. 21. The Elbe flooded other German cities including Wittenberg, Magdeburg and Torgau. Travel to all cities affected by the floods should be avoided until at least mid-September to give the communities time to get services up and running again.