Residents and visitors are advised to stay hydrated and cautious of fast-developing storms during the MLB All-Star Week.

Residents can use the NWS Heat Index Calculator to calculate what the heat index is locally. In addition, there is the Heat Index Chart with a wider range of temperatures and humidity percentages.

Heat-related illnesses occur across a spectrum, and mild heat stress can quickly progress to life-threatening heat stroke if a person is exposed to dangerous conditions for too long.

Extreme danger: When the heat index is 125 degrees or higher, heat stroke is likely. Here's a chart to help you find out what the heat index is. You can also use this heat index calculator. During ...

As a late-summer heat wave hits Ohio, use this heat index chart to see how hot it feels outside.