AUSTIN (KXAN) – With blistering heat this summer, you’ve likely heard a few people say “it’s not the head, it’s the humidity.” Turns out both things are true: it’s called the Heat Index. The heat ...

The temperature on any given summer day may be in the 80s or 90s. So why does it feel so much hotter and oppressive at times? That's the heat index doing its thing. Here's how it works: What is the ...

Rochester is entering its first heat wave of the summer, with an air temperature above 90 degrees expected for the next four days. The heat index will be even higher, expected to exceed 95 degrees ...

The heat index measures how hot it really feels outside. The heat index is calculated based on air temperature and relative humidity. The National Weather Service will issue alerts when the heat index ...