Some hot days feel even worse thanks to high humidity, trapped heat and dew points. Cities are especially vulnerable. By Nazaneen Ghaffar Nazaneen Ghaffar is a reporter on The Times’s weather team. It ...

The heat index combines temperature and humidity to show what the air actually feels like — and understanding it could keep ...

'Feels like' temperatures are just another name for the heat index. Here's how to understand the calculations as temperatures ...

The number on the thermometer only tells half the story. Here’s what to know about heat index—and why some scientists are ...