Summer is here, and heat and humidity have arrived.

Today's extreme heat for the World Cup match between Portugal and Croatia is expected exceed world soccer union guidelines based on the "wet bulb" temperature. That's already happened for a number of ...

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

Cincinnati and the Midwest are experiencing a heat wave with heat index values reaching up to 105 degrees. A heat advisory is ...

The oppressive air mass will likely linger into Friday, though showers could bring some some relief.

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

Officials warn the prolonged heat significantly increases the risk of heat-related illness, especially for those spending ...

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

Every time the UK experiences a heatwave, many ask the same question: why does the heat in Britain feel so unbearable when ...

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