The UV index is an international standard measurement that indicates the strength of sunburn-producing ultraviolet (UV) radiation at a specific place and time. It's used in daily and hourly forecasts to inform the public about the level of UV radiation and the potential for skin and eye damage. The index ranges from zero upwards, with higher values indicating greater potential for harm and less time it takes for that harm to occur¹.

Here's a quick breakdown of the UV index scale and what each range means for sun exposure:

• 0 to 2: Low risk of harm from unprotected sun exposure.
• 3 to 7: High risk of harm from unprotected sun exposure. Protection against skin and eye damage is needed.
8 to 10: Very high risk of harm from unprotected sun exposure. Extra precautions are necessary.
11+: Extreme risk of harm from unprotected sun exposure. Take all precautions because unprotected skin and eyes can burn in minutes.