. >>> we continue to follow developments this morning as this hurricane pummels the bown star state. now to houston where stephanie gosk has been tracking the storm and the historic damage it's bringing. stephanie? >> reporter: the city of houston tonight, how much rain will fall and how quickly will it come? the question is drainage in this city. if it's slow enough, the city hopefully will have the capacity to allow that water to drain. the drainage system in the city is not great. it is a low-lying city, drainage systems over 100 years old. rests in an area interlaced with bayous. there's one bayou in particular that people in the city are concerned about. it's called braise bayou, and it's flooded the last two years in a row. they will be keeping a close eye on that bayou. the other area of concern is to the west of the city. it's two dams. the dams are critical because they stop the floodwater from going down into the city of houston which has a population of 6.6 million people. the army corps of engineers says say that are monitoring dams 24 hours, round the clock, not what the