Emnition

I'm in what I guess is supposed to be Amsterdam, though it doesn't resemble reality at all. I'm somewhere underground with a group of people. It is some kind of excursion. To what seems to be the north is a long, steep road, with a significant amount of water running down from it, as it seems to be currently raining. Because the road is made of asphalt, the water cannot permeate the surface. Somewhere at the end of the road, at the low level, the ground is natural soil, which is soaking up all the water and actually starting to flood. We have nowhere we can go, as we're underground. There is one small square building, not even 2 x 2 metres. The room has a ladder in it, going straight up. I decide to check it out, to see if we can exit from there. At the top is a window through which we'll have to exit, after which we have to exit through another window. They're both very small though. I tell the person in charge that we may be able to exit, but that either a smaller person will have to check it out since I'm too big to fit, or that I will have to break both windows. I have an idea how to prevent floods in the future: trees. The road needs a lot of trees. They will stop the water from running off and will soak it up. The asphalt will have to be removed though.