July 18th, 2017 -- WeatherEDGE live from Austin's Colony Park

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JULY 18th, 2017 - The UV Index is a measurement used to determine the strength of the sun's ultraviolet rays. The higher the number, the more at risk you and your family are to harmful rays.

The scale goes from 0-11, with 11 being the extreme end of the scale. Did you know there is a handy way of determining your risk of overexposure to the sun. It's called the Shadow Rule. You can test this rule at home with chalk and a little bit of fun drawing around your shadow.

If your shadow is taller than you are (early morning or late afternoon/evening), your UV exposure will be lower. However, if your shadow is shorter than you are (around midday), then you are being exposed to higher levels of UV radiation. This is a good time to seek shade and remember to protect your skin and eyes. Sunscreen and sunglasses will come in handy here.