Scorching summer days have returned to Kansas, with temperatures topping 100 degrees in the heartland.

Stormteam 12 forecasters say there's not much relief in sight, either. Many people are staying inside with the air conditioners running on full blast. Others are finding relief at the pool.

But if you are outside, it may feel warmer than what the temperature gauge reads. The heat index measures how hot it feels with the humidity is factored in with the air temperature.   

Click here for a heat index calculator

For example: If the temperature is 100 degrees and the relative humidity is 60 percent, the heat index would be 129! However, with 100 degrees and 40 percent relative humidity, the heat index is instead 109.

When the humidity is high, the sweat on our body doesn't evaporate as quickly. Sweat helps cool body temperatures.

If you do have to be outside for an extended period of time, be sure to drink plenty of fluids, and take frequent breaks in the shade.