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Flood Changes in Austin, TX

Ever heard of Atlas 14? Probably not, but you might this fall.

Due to the increased frequency of heavy rains, storms, and flooding in the Austin area, a study called Atlas 14 was conducted by the National Oceanic and Atmospheric Administration (NOAA).

Atlas-14 shows a roughly 33% increase in the amount of rain that could fall in Austin within a 24-hour period. As a result, properties in close proximity to the city’s creeks are exposed to greater flood risks.

What does this mean for Austin residents?

In October, the City Council will vote on whether to implement Atlas 14’s recommendation to redraw the flood maps for Austin.

If approved, homeowners who currently own property located in a 500-year floodplain may be re-zoned to a 100-year floodplain, those in a 100-year may be re-zoned to a 25-year, and those not in a floodplain could enter one.

Flood plains are determined by the likelihood that a storm with high rainfall intensity could happen in any given year. A 25-year storm has a 4% chance of occurring each year; a 100-year storm has a 1% chance of occurring, and a 500-year storm has a 0.2% chance.

If your home is rezoned to fall in a 100-year or 25-year floodplain, your insurance provider will likely be contacting you to require that you add flood insurance to your home insurance policy. If your home is not currently in a floodplain but is rezoned to fall in one, you may want to consider purchasing flood insurance voluntarily, just to be on the safe side.

How to check if your home could be affected by rezoning:

  1. Visit this website and click the “I want to” button, followed by “explore Atlas 14 changes”
  2. Learn more by reading this article by Austin’s Community Impact magazine
  3. Read more here on austintexas.gov

 

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April 29, 2019