The UV index is an international standard measurement of how strong the ultraviolet (UV) radiation from the sun is at a particular place on a particular day. It is a scale primarily used in daily forecasts aimed at the general public. Developed by the National Weather Service and EPA, it indicates the strength of solar UV radiation on a scale from 1 (low) to 11+ (extremely high). You can use the UV Index to take appropriate sun-protective behaviors and avoid overexposure to UV radiation.
Below are the precautions you should take provided the UV Index number:
|0-2||Minimal protection is needed – Wearing a hat is sufficient|
|3-4||Low – Hat and sunscreen with at least SPF 15 is recommended|
|5-6||Moderate – Wearing a hat, applying sunscreen with at least SPF 15 and taking shade whenever possible is recommended|
|7-9||HIGH – In addition to the precautions recommended above, it is advised to stay indoors between 10am and 4pm|
|10+||VERY HIGH – In addition to the precautions recommended above, it is advised to stay indoors if possible|
|Over 9||Less than 15 minutes|
|7-9||About 20 minutes|
|4-7||About 30 minutes|
|0-4||More than 1 hour|
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