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Why "500-year" floods aren't as rare as you think

Name: Why "500-year" floods aren't as rare as you think
Uploaded: 2017-09-08T08:16:00-0400
Duration: 2 min 38 s
Description: Hurricane Irma comes just two weeks after Hurricane Harvey brought "500-year" rainfall to parts of Houston. The U.S. has experienced at least 24 of these so-called "500-year" rain events since 2010. Kris Van Cleave reports.

Hurricane Irma comes just two weeks after Hurricane Harvey brought "500-year" rainfall to parts of Houston. The U.S. has experienced at least 24 of these so-called "500-year" rain events since 2010. Kris Van Cleave reports.