There are four advisories for heat, according to the National Weather Service: Excessive heat outlooks: The outlooks are issued when the potential exists for excessive heat within the next three to ...

Roughly 130 million people were under threat Saturday and into next week from a long-running heat wave that already has broken records with dangerously high temperatures — and is expected to shatter ...

Millions and millions of Americans are being warned of "dangerous" heat in more than a dozen states as the summer 2025 season officially kicks off. In parts of the Midwest and Mid-Atlantic regions ...

Add Yahoo as a preferred source to see more of our stories on Google. The National Weather Service's heat map for Thursday, color-coded by warning level. Orange: moderate heat warnings; red: major ...

The heat index measures how hot it really feels outside. The heat index is calculated based on air temperature and relative humidity. The National Weather Service will issue alerts when the heat index ...