The National Weather Service has issued Heat Advisories and Extreme Heat Watches throughout many parts of Illinois this weekend, warning of dangerously hot conditions and heat indexes over 100. Going ...

Springtime means longer days, warmer temperatures and higher Ultraviolet, or UV, Index levels. Wednesday's UV will be at level 5, which is considered moderate. The UV Index will soon be at dangerous ...

The UV index measures the intensity of skin-damaging ultraviolet radiation at the Earth's surface. The UV index ranges from 0 to 11-plus, with higher values indicating greater risk of sunburn and skin ...

Some people use the UV index to determine the best time to tan, believing that a higher index signals a better chance of tanning. However, this harmful trend misunderstands the UV index. The UV index ...