Houston flooding expected to get worse before it gets better

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CBS News Correspondent Mark Strassmann joins CBSN amid a lull in Tropical Storm Harvey. But officials say flooding is expected to get worse before it gets better.

A Look at Why Houston Floods | NBC Nightly News

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Experts say the “bayou city” is so vulnerable to floods — not only because it is low-lying — because explosive growth in the metro area has added 25 percent more pavement in the last 15 years, repl…