By Lester Holt, NBC News anchor
As Hurricane Ike dissolves into a nasty tropical depression, its impact only seems to grow. The drama of yesterday's hurricane force winds and pounding surge has given way to rescuers racing against the clock. Our correspondents are out and about in Galveston beaming back incredible pictures of damage. Most ominous of all is the city's west end, where flood waters have prevented rescuers from reaching those who may be trapped. Already, 2,000 people have been rescued, and many of them are the same people who last week thought it wasn't necessary to evacuate. Officials say Galveston is simply not habitable at this moment.