For example, the NWS says if it's 96 outside and the humidity is 65%, the heat index temperature is 121 degrees. That falls in the orange zone of the chart, indicating a dangerous temperature.

What does the heat index chart look like? ... At an apparent temperature of 103 degrees or higher, serious heat-related illnesses may occur, such as, heat stroke, cramps or exhaustion.

Monday ended both June and the year’s first half on a day that fulfilled the requirements for summer in Washington: ...

NOAA has a chart that shows how the heat index is affected by humidity. For example, a day that is 90 degrees Fahrenheit (32 Celsius) can hit the ''danger'' level with 70% humidity. Tips for ...

For example, the NWS says if it's 96 outside and the humidity is 65%, the heat index temperature is 121 degrees. That falls in the orange zone of the chart, indicating a dangerous temperature.

Climate change has been exacerbating heat waves, and the problem isn't going away anytime soon. An increasingly hot planet — due largely to burning fossil fuels such as coal, oil and natural gas — ...

Heat index values — remember what it "feels like" — are expected to be at or exceed 105 degrees Monday, June 23, through Wednesday, June 25 in New Jersey, NOAA said in a briefing on Friday ...