What is heat index and how does it affect how stifling excessive heat feels?

Michigan's heat wave this week will feel even warmer because of high humidity. Here's how the heat index works.

Exercising outside in high temps can be a health hazard. Here's how to read your local index, according to a doctor, so you ...

Summer is here, and heat and humidity have arrived.

As summer temperatures rise, dairy cows are at greater risk for heat stress. Heat-stressed cows suffer from reduced dry ...

The heat index shows how humidity makes hot days feel hotter, and why direct sun can push dangerous conditions even higher.

Why British Heatwaves Hit Differently. Every time the UK experiences a heatwave, many ask the same question: why does the ...

With the Louisville-area facing a prolonged heat wave, it’s important to take care of yourself and check on the people around ...

Three firefighters have died battling a fast-moving blaze along the Colorado-Utah border, officials said, as dozens of infernos rage across the West, with Utah imposing sweeping restrictions on Fourth ...

Tuesday brings late-day storms across parts of the Boston area before a prolonged stretch of dangerous heat arrives in ...