This is a shot of downtown Budapest in August 2002, when the floods were all over Europe. This is a place where the Danube is about 5-8 meters lower normally. You can see the tram line going under water. I was there just to pick up a group from the airport. It was scaring but fun to see the streets ending in the water. It stopped there, it didn't increase - no major damages were produced to the city (I don't know about the subway though..)