Because you’re a smooth-skinned mammal, no weather feels quite as oppressive as a humid heat wave. The more water vapor in the air, the less efficiently your sweat can evaporate and carry excess 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 ...

The iTHX-SD transmitter lets users view virtual charts and record temperature, relative humidity and dew point over an Ethernet network or the Internet with no special software—just a Web browser. The ...