This July 4th could be hottest ever in parts of U.S. Maps show the forecast expected to break records.

Extremely dangerous heat, coupled with humidity, could result in heat index readings of 100 to 115 degrees from the Midwest ...

Why we have so many ways to measure hot weather

Temperatures are skyrocketing for the third straight day across the Eastern US, but there’s at least three different ways to ...

Are you one of the millions of Americans trapped in a 'heat dome?'

Track extreme heat alerts with this interactive map.

Where, when and how bad the Fourth of July heat wave will be, in seven diagrams, charts and maps

The U.S. is looking at an unwelcome birthday gift: a dangerous heat wave arriving ahead of the holiday weekend. Limited time: ...
The New York Times

What Exactly Is the Heat Index Anyway?

The metric of how hot the air actually feels has roots in a 1979 journal paper called “The Assessment of Sultriness.” By Andy Newman In recent days, you may have seen or heard many mentions of a ...

Heat Wave Spreads East on Wednesday, Putting Millions More at Risk

More than 160 million people are under extreme heat warnings or heat advisories ahead of the Fourth of July weekend.

Timeline maps show how bad the surging heat and humidity levels will get

Boston and New England are now into one of the most intense stretches of extreme, triple-digit heat on record. A massive heat ...

Hospitals in Europe are gearing up for the next heat wave armed with lessons from this one

A fast-food restaurant helped out last week, saying the hospital could take its ice. Staff also bought ice from the ...

Heat dome to scorch major U.S. cities this week. Maps show the forecast and warnings.

A heat wave will blast much of the eastern U.S. this week, and forecasters say temperatures will feel even hotter because of ...