Add Yahoo as a preferred source to see more of our stories on Google. "It's not the heat, it's the humidity." Actually, it's both, and that's where the National Weather Service's heat index comes in.

During the hot, humid summer months, meteorologists often discuss the heat index instead of the actual air temperature. But how is the heat index calculated, and why is it more important than the air ...

The heat index, or apparent temperature, combines air temperature and humidity to indicate how hot it feels to the body. High humidity slows sweating, the body's natural cooling system, making ...

IMD has issued heat wave alerts in 27 cities as temperatures near 41°C, highlighting why ‘feels like’ temperature, influenced ...

As temperatures continue to rise across the country, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) regularly issues heat index advisories to help Filipinos ...