People are taking to social media to moan and groan about the \

Several cities are under extreme heat warnings as high temperatures and humidity grip parts of the country

A heat wave is currently affecting about 160 million people, according to the National Weather Service. Here's which states feel the hottest.

Experts warn that the soaring temperatures could aggravate the risk of heat-related illness, especially due to high humidity levels.

People are taking to social media to moan and groan about the \