This is an article from the Houston Chronicle back in February:
Models show 'massive devastation' in Houston
Damages could cost up to $50 billion -- 10 times Allison's cost
By ERIC BERGER
Houston's perfect storm would feed on late summer's warm waters as it barreled northward across the Gulf of Mexico, slamming into the coast near Freeport.
A landfall here would allow its powerful upper-right quadrant, where the waves move in the same direction as the storm, to overflow Galveston Bay. Within an hour or two, a storm surge, topping out at 20 feet or more, would flood the homes of 600,000 people in Harris County. The surge also would block the natural drainage of flooded inland bayous and streams for a day or more.
Coastal residents who ignored warnings to flee would have no hope of escape as waters swelled and winds roiled around their homes. Very likely, hundreds, perhaps even thousands, would die.
Meanwhile, as the storm moved over western Harris County, its most dangerous winds, well in excess of 120 mph even inland, would lash the Interstate 45 corridor, including Clear Lake, the Texas Medical Center and downtown.
Many older buildings could not withstand such winds.
Anything not tied down, from trees to mobile homes to light poles, would become missiles, surreally tumbling and flying through the air, flattening small houses, shattering skyscraper windows and puncturing roofs.
"Unfortunately, we're looking at massive devastation," said Roy Dodson, president of the engineering firm Dodson & Associates, which Harris County asked to model realistic "worst-case scenarios" for a major hurricane hitting the area. ..cont'd
http://www.chron.com/cs/CDA/ssistory.mpl/metropolitan/3046592Copyright 2005 Houston Chronicle