In fact, the whole situation is going to take a few more days to cool down, as the flood surge has now passed the city, but the water levels are falling very slowly, which keeps the levees under pressure.
There are a few residential and industrial areas in the city that are underwater about hip-deep, and about 25,000 people have been evacuated from the eastern parts, but the area west of the River Elbe is mostly unaffected. Plus, a local fur who works in one of the office blocks at the City Carré has confirmed on Twitter today that the Maritim is indeed still standing.
Most of the flooding happened further up the river and in more rural areas, so it's pretty much expected at this point that nothing extreme will happen, unless they have an unexpected levee failure in a critical location over the next two or three days. There are currently a large number of road and rail disruptions (the main line to Berlin is out of service, for example) but nothing that shouldn't be cleaned up by the time we get there. Thankfully, this is not like the 2002 floods that washed away houses and railway lines, but more of a slower, higher and longer-lasting surge.
The BBC, by the way, has this report:
http://www.bbc.co.uk/news/world-europe-22835947