Deadly Combination of Heat, Humidity Aims at U.S. East Coast
- Index could reach 115 in region from Phildelphia to Raleigh
- Brutal heat follows the hottest June since at least 1880
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How hot is hot? Temperature alone doesn’t tell the tale.
The combination of heat and humidity can make temperatures feel hotter, and kill you quicker. That’s bad news for the elderly, the very young and the sick, and the reason the U.S. National Weather Service has been listing heat indices factoring in humidity since the mid-1980s.