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A boat passes through a flooded street during the aftermath of Hurricane Harvey on August 27, 2017 in Houston, Texas.
Hurricane Harvey left a trail of devastation after the most powerful storm to hit the US mainland in over a decade slammed into Texas, destroying homes, severing power supplies and forcing tens of thousands of residents to flee. / AFP PHOTO / Brendan Smialowski        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)
A boat passes through a flooded street during the aftermath of Hurricane Harvey on August 27, 2017 in Houston, Texas.
Hurricane Harvey left a trail of devastation after the most powerful storm to hit the US mainland in over a decade slammed into Texas, destroying homes, severing power supplies and forcing tens of thousands of residents to flee. / AFP PHOTO / Brendan Smialowski        (Photo credit should read BRENDAN SMIALOWSKI/AFP/Getty Images)

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    Thousands rescued as hundreds more need help

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Thousands rescued as hundreds more need help

CNN's Brian Todd reports from Houston.

Thousands rescued as hundreds more need help

CNN's Brian Todd reports from Houston.